[Text/Observer Network Xiong Chaoran] "Does the United States really dare to freeze or even confiscate China’s official reserve assets?" Last month, Wang Yongli, former vice president of Bank of China and a senior researcher at Chongyang Financial Research Institute of Renmin University of China, asked this question in an article he wrote.

This is indeed a good question, especially after the conflict between Russia and Ukraine, the United States and its allies imposed severe sanctions on the Russian central bank, making about half of its foreign exchange reserves unusable. The West also cut off some large Russian banks from the western financial system and banned many high-tech products from exporting to Russia.

In the latest issue of The Economist, published on April 23rd, local time, the magazine interviewed many experts and scholars, and analyzed and discussed this question-if China acts at the geopolitical level, such as the mainland’s "Wu Tong" Taiwan Province, will the west treat China like Russia?

According to the article, most experts agree that it is impossible for western countries, led by the United States, to seriously damage China, the world’s second largest economy, while their own financial systems and trade markets are not seriously damaged. Therefore, for this reason, the West may "be afraid to go that far".

Screenshot of The Economist report

The article first quotes Eswar Prasad, a professor at Cornell University in the United States, saying that "the United States and its allies certainly have ways to deal with China". He believes that at present, the power center of global finance is still firmly occupied by the West, and two-thirds of China’s $3.2 trillion foreign exchange reserves may be western government bonds, and the United States and European countries can freeze these assets when necessary.

"But do western countries really dare (freeze assets)?" Subsequently, this article in The Economist immediately raised such a question. According to the article, freezing China’s foreign exchange reserves may not cause too much instability. China can find other ways to fight back, and the large amount of assets held by westerners in China will also be worrying.

Gerard Pi Bo, a senior researcher at the Center for International Strategy and Studies (CSIS), pointed out that in return, China could confiscate foreigners’ assets in China. By the end of last year, foreigners had $3.6 trillion in direct investment in China, including fixed factories and $2.2 trillion in stocks, bonds and other "portfolio" investments, which was six times as much as the equivalent assets held by foreign countries in Russia.

Data Map: Employees of a foreign trade enterprise in Pingxiang Logistics Park of China-ASEAN Free Trade Area are producing exported electronic products.. Photo from Xinhua News Agency

"What if the West also imposes sanctions on financial institutions other than the Bank of China?" The Economist has considered this question again, and the answer is that this may make western institutions face "financial backlash".

According to the data of the Financial Stability Board (FSB), an international financial regulator, among the 30 banks with "specific systemic importance" in the world, 4 are China banks. If these banks are attacked, it may harm the interests of western institutions that provide loans to them or open accounts there.

Clay Lowery of the International Finance Association (IIF), a bankers’ organization, said that he was "not confident" about whether western countries had the confidence to cut off the business of China banks in order to keep their financial stability undisturbed.

The article points out that if the West adopts these sanctions against China, it will also cause serious damage to trade. Last year, less than one-fifth of China’s trade was settled in RMB, and most of the rest was settled in US dollars.

Martin Chorzempa, a senior researcher at the Peterson Institute for International Economics in the United States, said: "Without insurance and trade credit, many economic activities will dry up. Since China is a major trading partner of more than 120 countries, this kind of destruction may turn the rest of the world against the United States and its allies. "

According to the article, China accounts for 18% of the total imports of the United States and more than 22% of the total imports of the European Union, including many parts used in domestic manufacturing. Therefore, blocking trade with China may harm the country’s own production, including its exports.

The proportion of parts and components of electronic and electrical products imported from China in 2020 is shown in The Economist.

According to the simulation calculation of Gabriel Felbermayr, a professor at Vienna University of Economics and his co-authors, if the United States and its allies cut China’s imports by more than 90%, its own exports will drop by nearly 10%.

Western experts believe that China’s most important influence comes from its vast market. The United States may want to deprive China of some high-tech R&D, such as semiconductors, but according to the data of Boston Consulting Group (BCG), a total ban on semiconductor production will cost American semiconductor companies 37% of their income and endanger more than 120,000 jobs.

At the end of the article, it is said that the West can strike Russia harder economically whenever Russia tries to fight back, but this may not be the case for China, which in turn will make China fight back. For example, as far as China is concerned, the export restriction of rare earth can be used as a tool, and rare earth is used in many electronic products, which may disrupt the supply chain of other manufacturing segments of electric vehicle battery boxes.

"Then, if the United States and its allies impose the same sanctions on China as on Russia, they may suffer considerable pain. For this reason, they may not dare to go that far, but they certainly hope that China will not find out. " The article draws such a conclusion.

This article is an exclusive manuscript of Observer. It cannot be reproduced without authorization.

　　Surprised or not? Your CT film is watched by an artificial intelligence computer!

　　The Medical Imaging Department of Nanjing Gulou Hospital applies the fashionable AI technology to the field of medical imaging. For patients undergoing chest CT examination in Gulou Hospital, the first "reader" of CT films is a specially trained artificial intelligence robot, which greatly improves the accuracy and speed of reading films. Recently, EBiomedicine, a sub-issue of The Lancet, introduced in detail the clinical application and transformation results of the SCI paper on "Artificial Intelligence+Medicine" led by Zhang Bing, director of the Medical Imaging Department of Nanjing Gulou Hospital. (Correspondent Liu Huiyan Intern Lu Wenqian Yangzi Evening News/Yangyan reporter Cai Yunqi)

　　A magical "game"

　　It only takes a second for a doctor to look at hundreds of pictures with the naked eye.

　　Director Zhang Bing has three computers on her desk. She demonstrated a naked-eye PK artificial intelligence reading competition to reporters. Director Zhang Bing first observed with the traditional naked eye mode to find lung nodules on CT films. There are more than 300 CT images of this patient. After preliminary screening, it is found that there is no big space occupation. However, if you want to observe small nodules, you still need to look at these more than 300 images layer by layer. Director Zhang read more than 300 pictures layer by layer on the computer, and it took about 10 seconds to preliminarily detect a small nodule with the naked eye. Then, on the other side of the computer, Director Zhang Bing calmly turned on the artificial intelligence system, just clicking the mouse on the image of the artificial intelligence system, and the diagnosis results popped up instantly on the work page: 9 suspected lesions. On the image on the left side of the work page, each suspected lesion is circled with a colored box and marked with a serial number. At the corresponding position on the right side of the page, each suspected lesion is listed according to the serial number, and the benign and malignant nodules are judged. The reporter saw that the first nodule detected by artificial intelligence coincided with the nodule observed by Director Zhang Bing with the naked eye. From the second, it was a nodule that was very small, light in color and difficult to find with the naked eye.

　　Speaking of the magic of artificial intelligence, Director Zhang remembered a case that impressed her deeply. A patient’s chest CT was examined by a doctor and found multiple small nodules, which could not be counted, but artificial intelligence accurately reported more than 800 nodules and clearly located the malignant nodules. This shocked everyone!

　　The "master reader" is tempered like this.

　　First-class experts as teachers, "feed" the data of hundreds of thousands of patients in TA.

　　How did the artificial intelligence computer master this stunt? Director Zhang Bing introduced that artificial intelligence has gone a long way before it is really put into clinical application. It takes more than three years to prepare the whole system and more than two years to turn the results into products. The whole team’s training of artificial intelligence is like a group of teachers educating and training a child to take the exam. In order to keep the children from making mistakes in the exam, the whole team fed a lot of "exercises" to the "children" — — Data. For example, in the practice of diagnosing pulmonary nodules, first-class experts in the field should be gathered. They input a lot of data about the diagnosis of pulmonary nodules to artificial intelligence, so that TA can learn what nodules are in memory again and again. In order to make the learning effect better and more rigorous, it is necessary to form a professional correction team to make rigorous feedback on every judgment of artificial intelligence. Only when more than two experts give the same opinion, will they give this answer back to artificial intelligence, so that artificial intelligence can learn deeply in constant practice and constant feedback, so as to master this skill thoroughly.

　　Can artificial intelligence make mistakes? Director Zhang Bing said that you don’t have to worry about it. Relevant data show that the diagnostic accuracy of artificial intelligence is very high, which is higher than that of junior doctors and close to that of senior doctors. Moreover, artificial intelligence is only the first level of film reading, as well as the second reading and review by doctors with senior titles, and the final report is the responsibility of the doctors who review the report.

　　The doctor’s two-hour workload was shortened to 100 seconds.

　　Director Zhang Bing introduced that the application of artificial intelligence in medical imaging brings all-round benefits to doctors, patients and the treatment process.

　　In the traditional artificial mode, imaging department is a platform to support the discipline, and doctors need to face a lot of workload every day. Take the imaging department of Gulou Hospital as an example, it needs to receive 2500 patients every day on average, while a normal person needs to see at least 300 images in CT. Taking the diagnosis of pulmonary nodules as an example, the size, shape and blood vessel section of nodules are very similar. Doctors in the traditional mode need to look at tens of thousands of images every day, and long-term work will inevitably lead to eye fatigue and mental inability to concentrate. Therefore, it is inevitable for doctors in imaging department to miss the diagnosis of nodules, which is also one of the pain points in the workflow of imaging department. After the introduction of artificial intelligence, tens of thousands of images have been handed over to artificial intelligence, which used to take 2 hours, but artificial intelligence can detect very accurate results with a click, which greatly improves the diagnostic efficiency.

　　There are about 300 chest CT images of a normal adult, but it is impossible to print all these 300 images in the actual printing process. Generally, one is printed every four images, so about 80% of the images are lost in the printing, and there are likely to be very critical images in the lost images, which is another pain point in the workflow. For example, a patient’s report shows that there is a big nodule on the 160th layer image, but the image on this layer is just skipped when choosing to print the image. To solve this problem, it is necessary to find the 160th floor again and print it again, which is very inconvenient for doctors and patients. Artificial intelligence automatically identifies and collects key images with nodules, and automatically puts these key images on the upper layer when printing and typesetting, which overcomes this difficulty well.

　　Extended reading

　　Will AI replace doctors? The answer is no.

　　Talking about whether artificial intelligence (AI) will completely replace the role of doctors in imaging department in the future, Director Zhang Bing thinks it will not. She laughed and said that artificial intelligence AI is still only the level of primary school students, and can only replace some simple repetitive work.

　　Although artificial intelligence has greatly reduced the workload of doctors and helped them to complete most of the work, these jobs are relatively primary and simple, really complicated and need comprehensive thinking to judge, and artificial intelligence can’t replace them.

　　In the future development, artificial intelligence will mainly assist doctors to solve many simple and repetitive tasks, so that doctors can focus more on the diagnosis and treatment of intractable diseases.

　　More applications in the future: it is expected to screen out tumors at a glance.

　　Artificial intelligence technology is the trend of scientific and technological development in recent years, and the combination of artificial intelligence and medicine is also the direction of medical development. Nowadays, the application of artificial intelligence is only limited to the judgment of a single disease, and it is more common in the diagnosis of pulmonary nodules. Director Zhang Bing told the reporter that her team has been deeply cooperating with Guo Hongqian, director of urology department of Gulou Hospital, to seek enough data to find prostate cancer in the process of image observation, so as to avoid the in-vivo puncture test that made patients very painful in the past.

　　"I hope that the future artificial intelligence will continue to grow under the support of sufficient data and sufficient training feedback, and it will be able to cope with more complex diseases, and play a role in improving efficiency and reducing errors in the whole process of imaging, so as to better help doctors treat patients and benefit mankind." Director Zhang Bing said. (Liu Huiyan, Lu Wenqian, Cai Yunqi)

In November, CPI rose by 4.5% year-on-year.
Stable price operation and solid foundation

Core reading

In November, CPI rose by 4.5% year-on-year, 0.7 percentage points higher than that of last month. Food is the primary factor affecting this round of price increase. However, excluding the disturbance of the structural rise of some foods, the core CPI in November was 1.4%, which has been in a stable state. This reflects that the macroeconomic operation is relatively stable, the total supply and total demand are basically balanced, and the current price has no basis for an overall upward trend.

According to the national CPI (Consumer Price Index) and PPI (Industrial Producer Ex-factory Price Index) data released by the National Bureau of Statistics on December 10th, the CPI rose by 4.5% year-on-year, with an increase of 0.7 percentage points over the previous month.

Why will the CPI increase continue to expand in November? What do you think of this 4.5%? The expected target of CPI in this year’s "Government Work Report" is "an increase of about 3%", so the increase of CPI in November will not affect the completion of the annual target? With these questions, the reporter interviewed relevant experts.

The structural rise of price operation is still outstanding.

From a year-on-year perspective, CPI rose by 4.5%, an increase of 0.7 percentage points over the previous month. Among them, food prices rose by 19.1%, affecting CPI by about 3.72 percentage points; Non-food prices rose by 1.0%, affecting CPI by about 0.77 percentage points. It can be seen that food is still the primary factor affecting this round of price increases.

Food prices have gone up and down, mainly fruits, while fresh vegetables and meat have gone up. In November, the price of fresh fruit continued to drop by 6.8% year-on-year, and the decline rate was 6.5 percentage points higher than that of the previous month. The price of fresh vegetables decreased from last month to increase by 3.9%; The price of aquatic products rose by 2.4%, down 0.3 percentage points from last month; The price of pork rose by 110.2%, and the prices of beef, mutton, chicken, duck and eggs rose by 11.8%-25.7%.

Among non-food items, the prices of medical care, education, culture, entertainment and clothing rose by 2.0%, 1.7% and 1.1% respectively. Traffic and communication prices fell by 2.8%; Among them, the prices of gasoline and diesel decreased by 10.8% and 11.3% respectively. According to estimates, in the year-on-year increase of 4.5% in November, the impact of price changes last year was about 0, and the impact of new price increases was about 4.5 percentage points.

"At present, the structural rise of CPI is prominent, and the clear source of the rise is caused by pork. The impact of price increases is basically controllable, that is, related foods such as meat with consumption substitution. " Guo Liyan, a researcher at the Institute of Market and Price of China Macroeconomic Research Institute, analyzed that in November, the increase in the price of livestock meat contributed more than 70% to the increase in CPI.

At present, there is no basis for an overall upward trend in prices.

Guo Liyan introduced that year-on-year, excluding the disturbance of structural rise of some foods, the core CPI in November was 1.4%, which has been in a stable operation state.

"This shows that the CPI center is stable, reflecting that the macroeconomic operation is relatively stable, and the total supply and total demand are basically balanced. The main industrial consumer goods, service prices, housing prices and energy prices are basically in a stable or stable trend, and the current prices are not fully upward. basis." Guo Liyan said.

Judging from the recent trend, prices are also in a stable state. Non-food prices rose by 0.2% last month and turned flat. Affected by the changing seasons, clothing prices rose slightly by 0.5% in November. Travel in the off-season decreased, and the prices of air tickets, travel agency fees and hotel accommodation decreased by 11.0%, 4.4% and 3.8% respectively. Food prices rose by 1.8% month-on-month, and the growth rate dropped by 1.8 percentage points, and many of them also fell.

Shen Yun, senior statistician of the Urban Department of the National Bureau of Statistics, analyzed that in November, a large number of fruits such as apples, oranges and pears were listed, and the price of fresh fruits decreased by 3.0% compared with the previous month; The supply of aquatic products is abundant, and the price dropped by 0.5% compared with last month; In winter, the production, storage and transportation costs of fresh vegetables increased, and the price rose by 1.4%; Affected by the peak consumption season and alternative demand, the prices of beef, mutton, chicken and duck increased by 1.3%-4.3%. The tight supply of pork has eased, and the price has increased by 3.8% month-on-month, with the growth rate dropping significantly by 16.3 percentage points.

"From the perspective of consumers’ feelings, the average price of lean meat in 36 large and medium-sized cities has gradually dropped from 34 yuan in early November to below 31 yuan at the end of the month, but the average price in the whole month is still significantly higher than that in October." Guo Liyan analyzed.

It is expected that there will be no problem in achieving the regulatory objectives throughout the year.

Food prices have risen significantly, and the feelings of ordinary people are the most direct. All localities quickly started the linkage mechanism of price subsidies according to national requirements. Since the beginning of this year, 30 provinces and Xinjiang Production and Construction Corps have distributed a total of 7.85 billion yuan of temporary price subsidies, benefiting 296 million people in need, and greatly alleviating the impact of rising food prices on the basic lives of people in need.

However, some people are worried that the expected target of CPI increase of around 3% this year can still be achieved?

Guo Liyan analyzed that the annual CPI is expected to remain at around 3%.

On the whole, China’s agricultural and industrial production is stable, the market supply is sufficient, and the total supply and total demand remain relatively balanced.

Looking at agriculture, the grain output has reached a new high. In 2019, China’s total grain output was 663.84 million tons, an increase of 5.94 million tons over 2018, a record high. The yield per unit area of cereals, beans and potatoes has all improved. At the same time of increasing grain income, apples, pears and other fruits have also been harvested, and the supply capacity of vegetables has continued to grow. Although the scale of pig slaughter has declined, the output of substitute meat such as chicken has increased significantly year-on-year, and the overall supply of meat protein is stable.

Looking at the industry, the product supply is very sufficient. China has a complete industrial production system, complete industrial categories and strong production capacity. In November, PPI decreased by 1.4% year-on-year, which also proved that the production capacity is sufficient.

"From the perspective of the whole year, considering the economic operation and the direction of macro-control policies, China’s stable price operation has a solid foundation, and there is no basis for overall price increases." Guo Liyan said that China has sufficient policy space, strong domestic market support, confidence, confidence, ability and conditions to ensure the smooth operation of prices. "It is expected that the annual control target of about 3% increase in consumer prices will be successfully achieved throughout the year." (Reporter Lu Yanan)

　　Chengdu Business Daily reporter Huan Xiaohuai’s photo report

　　In the monitoring screen, Uncle Li looks around in the corridor of the Pixian government office, scanning the house number information on both sides. A few minutes ago, he was helped into the office building by the security guard at the door as a blind man, seeking assistance from the civil affairs department of Pixian County.

　　When the person in charge of the Pixian rescue management station rushed to the scene, Uncle Li showed his true colors. He had been rescued 126 times in the national rescue management information system, and his trip went north along the Yangtze River from his hometown of Jiujiang, Jiangxi, all the way to Sichuan.

　　The story of a professional runner

　　Build a building with computers and organic hemp.

　　On June 21, an old man with sunglasses and a crutch caught the attention of the security guard at the door outside the building of Pixian government office. "He said he would go to the Civil Affairs Bureau for help." Mr. Li, the security captain, recalled that everyone thought he was blind and helped him into the building. The old man took the elevator to the outside of the office of the Civil Affairs Bureau of Pixian County, but the security guard who was watching found the "blind man" looking around the corridor. The office of the Civil Affairs Bureau informed the person in charge of the rescue station to come to understand the situation, but Uncle Li only asked for accommodation.

　　When checking the information, the rescue station found that Uncle Li was named Li Hongbiao, and there have been more than 120 aid records. After being caught, Uncle Li pressed the elevator himself, walked down the 9-step ladder neatly, and stopped a taxi to leave after going out.

　　The reporter inquired that Uncle Li lives in a township in Wuning County, Jiangxi Province. The reporter contacted the local village party secretary Li Moumou. He revealed that Uncle Li has a disability in one eye and an 80-year-old mother. These are facts, but he is wandering all the year round. "The main reason is to make some money." Li Moumou said that Uncle Li’s family has a building on the first floor and the first floor. It was just renovated last year. There are computers and two or three machines at home. Usually, villagers are recruited to play mahjong at home and collect some tea money.

　　According to the National Rescue Management Information System, Uncle Li started running in December 2010 and went to Sichuan seven times. He was helped in food, accommodation and communication during the rescue.

　　■ More than 120 aid records Uncle Li, wearing sunglasses and crutches, appeared in the Pixian government office building and asked for help. Everyone helped him into the building, but he looked around in the corridor. Through information checking, he has more than 120 information on aid. After being caught, he pressed the elevator, walked down the 9 steps neatly, and stopped a taxi to leave after going out.

　　■ Rescue management upgrade The upgraded version of the National Rescue Management Information System began to be used this year, and the situation of the rescued people receiving assistance at rescue stations across the country is clear at a glance. It can help the rescue station to identify professional runners like Uncle Li.

　　Professional runners are all acting school.

　　Can pretend to be blind, can vomit blood and want money.

　　Lao Xiong has seen a lot of professional runners like Uncle Li. "One knows the policy better than the other. Real recipients are willing to go home, but they don’t just want money. "

　　Letters of distress and certificates of honor are all false.

　　In the records of the Pixian Rescue Station, on February 3, 2015, Xiao Wang, a 32-year-old from Xinxiang, Henan Province, came to the station to claim that he had AIDS and asked for money to buy medicine. Lao Xiong said that he could take him to the hospital. He also proposed to go home. The staff of the rescue station accompanied him to the station. "Generally, you can’t give money directly. You should watch them get on the bus when you buy a ticket, otherwise they will refund the ticket and cash out."

　　In the waiting area of the station, Xiao Wang went into the toilet and spat blood when he came out. When the staff of the rescue station and the station staff were busy, Xiao Wang disappeared. It turned out that he had returned the ticket and left the station.

　　Lao Xiong took out a pile of information, which was full of "critically ill notice", "distress letter" and "honorary certificate" … … "These are all false help-seeking materials that we found in joint investigations with the public security and urban management. They are all fake!" The reporter counted that there were 55 such materials.

　　"If you receive a helper from the public security and urban management departments, or if the rescue station patrols the street and finds someone asking for help." The staff of the rescue station said that they wanted to get help at the first time, but after verification, they often fell below the glasses — — Riding thousands of miles for 8 yuan and seeing netizens cheated are all routines.

　　"Running King" ran 874 stops in five years.

　　Last year, Pixian Rescue Station rescued more than 180 people. Among these recipients, 55 people have been rescued for more than three times, and 40 of them have been rescued for more than 100 times.

　　According to the national rescue information system, Lu Ming, who lives in kaiyuan city, Tieling, can be called the "running king". He began to "run the station" on May 21st, 2011, with a record of 874 stops, seeking help in food, accommodation, communication and transportation at the rescue station. According to the 88-page record, he has traveled all over Yunnan, Sichuan, Guizhou, Guangxi, Hunan, Jiangxi, Fujian, Guangdong, Hainan, Shaanxi, Gansu, Qinghai, Jiangsu, Shanghai, Shenzhen, Liaoning and other places. Among them, Yunnan, Hunan, Jiangxi, Fujian and Guangdong are the main positions, and almost every county in Yunnan has been visited.

　　From January to June this year, Lu Ming ran 30 stops every month. His latest record is that he was rescued in Maitreya County on June 23, and on June 17, he went to the rescue stations in Yuping, Xinhuang and Putian for help, running three rescue stations a day.

　　monster-revealing mirror

　　The nationwide network of rescue system blocks the space for runners to cheat money.

　　Professional runners waste social resources and occupy the space that really needs rescuers. The rescue station called for a more perfect linkage mechanism and blacklist system to block their space.

　　Lao Xiong revealed that the runners also built a QQ group. Where it is easy to fool, they will run to that place. Fortunately, the upgraded version of the National Rescue Management Information System began to be used this year. This is a "magic mirror". The information of the rescued person is clear at a glance, and the situation of his rescue at various rescue stations can be found. "It can help us improve our screening ability."

　　That’s how Uncle Li was identified. However, according to the principle of rescue management, "many times, although we know that it is a stop, we can’t ignore them." Lao Xiong said that Article 50 of China’s "Interim Measures for Social Assistance" stipulates that the state provides temporary accommodation, emergency treatment, assistance in returning and other assistance to vagrants and beggars who have no livelihood. However, the Ministry of Civil Affairs stipulates that, in principle, cash should not be provided to recipients. Due to special circumstances need to provide short-distance public transportation, generally not more than 20 yuan. Lao Xiong said that with the networking of the system, some runners began to March into towns and villages, "only go once, and then stop."

　　After a long time in the rescue station, the staff can tell who really needs help. "Real help seekers will be willing to stay or ask to go home." The old bear said, while runners are often articulate and clear-minded. Lao Xiong said that Chengdu has also established a linkage mechanism. People in towns and villages who need assistance should contact the rescue station in time. Those who have been rescued by the rescue station will also send a list to towns and villages to avoid repeated assistance. "Professional runners waste social resources and occupy the space that really needs rescuers." Lao Xiong called for the establishment of a more sound linkage mechanism and blacklist system, so that they have no loopholes to drill.

　　I. Policy background

　　In 2016, the city implemented the decentralization of urban renewal and strong areas. According to the Decision of Shenzhen Municipal People’s Government on Implementing the Reform of Urban Renewal (Order No.288 of Shenzhen Municipal People’s Government) (hereinafter referred to as Order No.288) and the Decision of Shenzhen Municipal People’s Government on Deepening the Reform of Planning Land System and Mechanism (Order No.298 of Shenzhen Municipal People’s Government) (hereinafter referred to as Order No.298), the examination and approval authority of urban renewal projects and the implementation plan of agricultural conversion involved are adjusted to district governments (including new ones) Under the new situation of decentralization in strong areas, in order to do a good job of linking up the work among provinces, cities and districts after the reform, better guide and standardize the examination and approval of land for urban renewal projects of demolition and reconstruction, and improve the efficiency of examination and approval, the Provisions on the Examination and Approval of Land for Urban Renewal Projects of Demolition and Reconstruction in Shenzhen (hereinafter referred to as the Provisions) is formulated in combination with the relevant provisions of the state, provinces and municipalities on land management, which serves as the basis for urban renewal agencies in various districts to examine and approve the implementation plan of land for urban renewal projects and the conversion of agricultural land.

　　Second, the main content

　　The "Regulations" consists of nineteen articles, the main contents of which are as follows:

　　(A) on the scope of application of the policy

　　The "Regulations" apply to the examination and approval of the implementation plan for the development and construction land and its agricultural land conversion.

　　(B) on the division of land use approval authority

　　According to Decree No.288 and its implementation opinions and Decree No.298, the municipal competent department of planning and land is the competent department of urban renewal business, responsible for the policy formulation and business guidance of the implementation plan for the development and construction of land and its agricultural land conversion, and summarizes the examination and approval of each district every six months and reports it to the municipal government; The district government is responsible for the examination and approval of the implementation plan for the development and construction of land and its agricultural land conversion; The urban renewal agencies in each district are responsible for the specific examination and approval work, and the relevant departments do a good job of cooperation within the scope of their duties.

　　(3) About the scope of land use approval

　　Urban renewal projects are based on the scope of project demolition defined by urban renewal unit planning, and land use approval is carried out according to the phased implementation timing determined by urban renewal unit planning. The "Regulations" distinguish four situations, which involve staging but not project implementation, not involving staging but sub-project implementation, sub-project implementation by stages, and sub-project implementation by stages, and clarify the units that approve the development and construction land. If a whole area contains a number of development and construction land, all development and construction land shall go through the formalities of land use examination and approval at the same time, and the subsequent procedures shall go through the formalities of signing the land use right transfer contract at the same time.

　　(four) on the land application materials and approval conditions.

　　In accordance with the Decision of the Ministry of Land and Resources on Amending the Administrative Measures for the Examination and Approval of Construction Land, the Notice of the Guangdong Provincial Department of Land and Resources on Implementing the Opinions of the State on Improving and Optimizing the Pre-examination and Review of Construction Projects, and the Notice of the Shenzhen Municipal Planning and Land Resources Committee of the Shenzhen Municipal Finance Committee on Further Defining the Payment Process of Paid Use Fees for New Construction Land, The Reply on Approving to Authorize the Shenzhen Municipal People’s Government to Exercise Relevant Land Management Authority, the Measures for Urban Renewal in Shenzhen and its detailed rules for implementation, and in combination with the provisions of relevant policies such as prevention and management of geological disasters, investigation and evaluation of soil environment, the Provisions clarify the application materials and conditions for examination and approval of development and construction land and its implementation plan for agricultural conversion.

　　(five) on the development and construction of land involved in the approved land without construction.

　　Linked to the Detailed Rules for the Implementation of the Measures for Urban Renewal in Shenzhen and the Technical Regulations for the Planning and Compilation of Urban Renewal Units for Demolition and Reconstruction in Shenzhen (hereinafter referred to as the Technical Regulations for the Planning and Compilation of Renewal Units), the Regulations stipulate the work of this situation in the stages of urban renewal unit planning approval, project implementation subject confirmation, cancellation of real property right certificate, land use approval and land transfer from the perspective of land use approval. Following the principle of equal area, equal period, equal development intensity and other functions, the area, use, plot ratio, transfer period and start date of the vacated land shall be implemented according to the agreement in the transfer contract of the land use right of the vacated land.

　　(six) the situation that the urban renewal unit contains overhead corridors, cross-street buildings or underground spaces.

　　The "Regulations" are linked with the "Technical Regulations on Updating Unit Planning", and the applicants, departments and procedures for land approval for public overhead corridors and public passages outside the scope of development and construction land are defined. At the same time, the "Regulations" clarify that the horizontal projection range, area and vertical elevation of overhead corridors, cross-street buildings or underground spaces should be clear when the construction land is approved. However, considering that it is difficult to define the specific spatial location in the stage of land use approval, the Regulations propose that in the stage of construction project planning permission, the horizontal projection range, area and vertical elevation can be appropriately adjusted according to the urban renewal unit planning and relevant standards and specifications, and a supplementary agreement on the land use right transfer contract can be signed, so it is not necessary to re-apply for construction land approval.

　　(seven) on the phased implementation of urban renewal units, there is a lack of legal land use indicators within the scope of later project demolition.

　　Urban renewal unit planning takes urban renewal unit as a unit for overall planning, and there may be insufficient legal land use indicators within the scope of later project demolition in urban renewal units implemented by stages. In this case, if the legal land use index of the later project is insufficient, the legal land use index of the signed land use right transfer contract can be used to exceed the area of the transferred development and construction land. When there are many kinds of land use categories beyond the legal land use index, they shall be used in the order of land price calculation.

　　(eight) on the urban renewal project involving non-agricultural construction land and illegal construction land left over from the history of rural urbanization.

　　In accordance with the principle of respecting history and safeguarding the rights and interests of the original rural collective, and according to the order of demarcation of non-agricultural construction land, the Regulations respectively stipulate different treatment principles for non-agricultural construction land before and after the disposal of illegal construction land left over from rural urbanization history.

　　(nine) on the situation that the urban renewal project involves the overlapping of non-agricultural construction land and old house village land.

　　For non-agricultural construction land and the old house village land overlap, the overlapping part is treated as non-agricultural construction land, and the old house village land is not included in the legal land use index; The overlapping part is treated as the land used in the old house village, and the non-agricultural construction land can be separately included in the legal land use index within the scope of demolition, and there is no need to adjust the non-agricultural construction land plan.

　　(ten) on the time limit and procedures for land use approval.

　　Combined with the relevant provisions of the administrative license, the time limit for examination and approval of development and construction land is 20 working days. The approval procedure is as follows:

　　Figure 1 Flow chart for approval of development and construction land

　　(twelve) land transfer and non-agricultural construction land index verification.

　　Urban renewal unit planning determines that the land to be handed over to the government free of charge should be handed over before the signing of the land use right transfer contract for urban renewal projects. Urban renewal projects involving non-agricultural construction land within the scope of demolition, the district urban renewal agencies shall notify the municipal competent department of planning and land to send agencies within the jurisdiction to write off non-agricultural construction land indicators before the signing of the land use right transfer contract for urban renewal projects.

　　(thirteen) the time limit and procedures for the approval of the implementation plan for the conversion of agricultural land.

　　If the development and construction land of the project involves the occupation of agricultural land and unused land, the implementation plan for the conversion of agricultural land shall be formulated by the district urban renewal agency and submitted to the district government for approval simultaneously with the development and construction land. The procedure is as follows:

　　Fig. 2 Flow chart for approval of implementation scheme of agricultural conversion

　　(fourteen) on the use of land use planning indicators.

　　Before compiling the implementation plan of agricultural land conversion for renewal projects, the district urban renewal institution shall solicit the opinions of the agencies dispatched by the competent department of city planning and land administration, and clarify the sources of new construction land indicators. The dispatched offices of the municipal competent department of planning and land shall, according to the reply issued by the district government, do a good job in the ledger management of the indicators of agricultural conversion in the jurisdiction, and report to the municipal competent department of planning and land regularly for summary as required.

　　(15) Information disclosure

　　After the district government issues the approval of construction land and the approval of the implementation plan of agricultural conversion, the district urban renewal institution shall make the approval of land use and the implementation plan of agricultural conversion public at the project site and portal website respectively.

　　(XVI) About the effective date.

　　The Regulations shall come into force as of the date of promulgation.

　　According to the WeChat WeChat official account of Shenzhen Health and Health Commission, there were 27 new positive cases in Shenzhen from 0: 00 to 24: 00 on September 29th, 15 cases were diagnosed as confirmed cases in COVID-19, and 12 cases were diagnosed as asymptomatic infected people in Covid-19.

　　Among them, 18 cases were found in centralized isolated observers, 4 cases were found in home isolated medical observers, 4 cases were found in non-closed-loop management key personnel screening, and 1 case was found in community screening.

　　The new cases are as follows:

　　Case 1

　　Female, 38 years old, living in Reservoir New Village, Cuizhu Street, Luohu District, was found among centralized isolated observers.

　　Case 2

　　Male, 36 years old, living in Reservoir New Village, Cuizhu Street, Luohu District, was found among centralized isolated observers.

　　Case 3

　　Female, 49 years old, living in Reservoir New Village, Cuizhu Street, Luohu District, was found among centralized isolated observers.

　　Case 4

　　Female, 63 years old, living in Reservoir New Village, Cuizhu Street, Luohu District, was found in the screening of key personnel in non-closed-loop management.

　　Case 5

　　Female, 29 years old, lives in the dormitory building at No.2019, Buxin Road, Cuizhu Street, Luohu District, and was found among home isolation medical observers.

　　Case 6

　　Male, 3 years old, living in the dormitory building at No.2019 Buxin Road, Cuizhu Street, Luohu District, was found among home isolation medical observers.

　　Case 7

　　Male, 41 years old, living in the courtyard of No.29 Dongmen North Road, Cuizhu Street, Luohu District, was found in the screening of key personnel in non-closed-loop management.

　　Case 8

　　Female, 43 years old, living in Sunshine World, Cuizhu Street, Luohu District, was found in community screening.

　　Case 9

　　Male, 49 years old, living in Dong ‘an Garden, donghu street, Luohu District, was found among centralized isolated observers.

　　Case 10

　　Female, 48 years old, living in Dong ‘an Garden, donghu street, Luohu District, was found among centralized isolated observers.

　　Case 11

　　Female, 50 years old, living in Dongle Garden, donghu street, Luohu District, was found among centralized isolated observers.

　　Case 12

　　Male, 35 years old, living in the second district of Buxin Garden, donghu street, Luohu District, was found among centralized isolated observers.

　　Case 13

　　Female, 43 years old, living in Jingxuan Garden, Huangbei Street, Luohu District, was found in the screening of key personnel in non-closed-loop management.

　　Case 14

　　Male, 63 years old, living in Yuling Garden, Nanwan Street, Longgang District, was found among concentrated isolated observers.

　　Case 15

　　Male, 52 years old, living in Yuling Garden, Nanwan Street, Longgang District, was found among concentrated isolated observers.

　　Case 16

　　Female, 46 years old, living in Yuling Garden, Nanwan Street, Longgang District, was found among home isolation medical observers.

　　Case 17

　　Male, 44 years old, living at No.21 Nanyuan Road, Nanwan Street, Longgang District, was found in the screening of key personnel in non-closed-loop management.

　　Case 18

　　Female, 48 years old, living in Rui Long Xuan, Longxiang Garden, Jihua Street, Longgang District, was found among centralized isolated observers.

　　Case 19

　　Male, 28 years old, living in Rui Long Xuan, Longxiang Garden, Jihua Street, Longgang District, was found among home isolation medical observers.

　　Case 20

　　Male, 44 years old, living in Lane 7, Laowei, Village 1, Buji Street, Longgang District, was found among centralized isolated observers.

　　Case 21

　　Male, 29 years old, living in Minzhi Street and Mansion in Longhua District, was found among centralized isolated observers.

　　Case 22

　　Male, 39 years old, living in Minzhi Street, Longhua District, Minle District 1, was found among centralized isolated observers.

　　Case 23

　　Male, 31 years old, living in the old village of clear lake, Longhua Street, Longhua District, was found among the centralized isolated observers.

　　Case 24

　　Male, 34 years old, living in the first phase of Xintian, Vientiane, xixiang street, Bao ‘an District, was found among centralized isolated observers.

　　Case 25

　　Male, 46 years old, living in Xiangbin Square, Xin ‘an Street, Bao ‘an District, was found among centralized isolated observers.

　　Case 26

　　Male, 38 years old, living in Xinzhou North Village, Shatou Street, Futian District, was found among centralized isolated observers.

　　Case 27

　　Male, 48 years old, living in Shanhaiyuan, Dapeng Street, Dapeng New District, was found among centralized isolated observers.

　　The above cases have been transferred to the emergency hospital of the Third People’s Hospital of the city for isolation treatment, and the situation is stable.

　　The trajectory of new cases involves Luohu and Longgang.

　　After preliminary investigation, the main activity tracks of new cases in recent days are as follows:

　　luohu district

　　Cuizhu Street:Riyue Yonghe Restaurant (Dong Xiao Store), Dong Xiao Meat Market, Lottery Station (Dong Xiao Comprehensive Building), Dong Xiao Vegetable Market Weimin Barber Shop.

　　Guiyuan neighborhood: West Lake Spring (Baihui Store), Bingfen Vientiane Skating rink, Xingmeile (Vientiane City Store)

　　Huangbei Street:Huazai Barber Shop, Table Tennis Club of Xinxiu South Industrial Zone

　　Donghu street:Starbucks (Xihuicheng Branch)

　　Dongxiao Street:Cao pu Nong pi market

　　Longgang District

　　Henggang Street:Riyue Yonghe Restaurant (Henggang Branch)

　　Nanwan Street:Zhongfujia Fresh Supermarket, Yuling Market and Yuesheng Roast Meat Shop.

　　At present, the disposal work such as flow tracing, isolation control, nucleic acid detection and medical treatment is being carried out in an orderly manner. Members of the public are requested to continue to fulfill their personal responsibility for prevention and control, take protective measures such as wearing masks, washing hands frequently, ventilation frequently, disinfection frequently, keeping social distance, and vaccination, and actively cooperate with the implementation of various epidemic prevention and control measures.

Original shichao bad review

Yesterday, Bing ushered in a super heavy update.

Apart from other details of the update, a comprehensive open beta is enough.

This means that you only need to register a Microsoft account to use Bing Chat.

In this way, I’m afraid Bing is the biggest language model with the lowest usage threshold at present.

In addition to the open beta, other updates are also very exciting. Before you rush to experience it, you can find out what new tricks Microsoft has made this time.

The world super here, for everyone to sum up as follows:

1. Multi-modal content and text mapping.

2. Historical record function.

3. Open plug-in access.

4, and a bunch of ultra-practical small functions.

It should be noted that at present, not all functions are open, so I will introduce them to you one by one.

First of all, it is the first update: graphic and multimodal content.

Although Microsoft launched Wencheng Map before, it has updated more than 100 languages this time, and now you can directly ask Bing to help you generate pictures in Chinese.

If you want to experience the latest pictures, you need to adjust the dialogue style to be "more creative". After that, just click and ask.

However, after the experience of Shichao, I feel that Bing’s Wen Chengtu is still almost interesting.

Because Bing is connected to DALL·E, the generated pictures may be good before. However, compared with midjourney and Stable Diffusion, which are now popular, it’s not enough. .

Moreover, although Chinese input is supported, the understanding of Chinese in Bing drawing is almost unknown.

When Shi Chao asked a classic "braised lion head", Bing really brought me a plate of lion head. .

If we look closely, we will find that it translates "lion’s head" into "lion’s head"

Sweet and Sour Mandarin Fish painted real squirrels and real fish. .

But Shichao soon discovered that it was not that Bing couldn’t draw. .

If we ask it to translate the input into English, it will understand that the lion’s head is not a lion, but a pork ball.

After the translation is in place, there is nothing wrong with the generated picture.

From this point of view, Bing’s own Chinese understanding should be no problem.

However, Wenchengtu is based on Bing image creator, a Microsoft painting platform, which may have translated Chinese literally when drawing.

After trying Wenchengtu, we are only halfway through the first big update. Visually, Bing has another highlight this time, which is its multimodal content.

When we ask a question, the related pictures will be displayed below the text results. In this way, the results can be displayed very intuitively, saving the time of going in and watching one by one.

Also asked "Braised Lion Head", Bing’s answer was completely correct, and even introduced the practice of this dish.

Shichao thought it would be convenient to use this image output function to find expression packs.

In addition to pictures, Bing’s multimodal mode also supports video output. Moreover, when we move the mouse to the video cover, we can also preview and play it online.

After that, not only the output content supports multimodal, but also the input can be uploaded with pictures.

What can be experienced at present is almost the first big update. Because of the following contents, most of them are not open to the public yet.

Although I can’t get started yet, from the demonstration video, it seems that they are the real highlights.

For example, the second updated history function can take the conversation experience to the next level.

Every time we ask questions, we will be saved in the guide on the right. Click on the question to jump to the corresponding location.

Moreover, after clicking on the answer link, Bing Chat will shrink to the side and become a page sidebar.

This small change is quite convenient. For example, if we import a PDF, we can use Bing to help you summarize, find words and translate.

In addition, Bing will also support long conversations. Even if we quit and close the chat interface halfway, the conversation will remain. Next time you click in, you can continue from the last place.

Chat content will also support exporting and sharing, and can be shared with friends on social media with one click, or imported into applications such as Word.

If the second update is to make it more convenient for users.

The third major update, which is also the most likely function of Shichao-plug-in, is to make Bing super-evolve.

The official example says that he is about to access the takeaway platform OpenTable. This means that in a word, you can ask Bing to recommend a restaurant for you, or make a direct restaurant reservation.

If you can access other platforms in the future, you may be able to stimulate stronger functions. For example, by accessing a map, you can make a route according to your own needs.

In addition, Microsoft will build a development platform to let more people participate in the development of plug-ins.

If this road goes on, it will be more than just the work done by search engines in the past.

In addition to the above three major updates, Microsoft also showed a lot of practical small functions, such as asking Bing to find a movie for you, and after finding it, you can jump and play it directly.

The mobile version will support page context questions, for example, if you are browsing an article or a website, you can ask Bing questions about what you are browsing, and it can also answer them.

Or write a manuscript directly on the Bing page and tell it the tone, length and wording you want.

I got so cruel that I even lost my job in Microsoft 365. .

Generally speaking, this update of Bing shows the ambition of this search engine.

That is: what search engines can do, I want to do my best, and what search engines can’t do before, I want to steal it now.

Moreover, in the official blog, Microsoft said that Bing’s daily activities have exceeded 100 million, and the daily installation of APP has increased fourfold.

In addition, the share of Edge continues to grow for 8 consecutive years, and various functions are updated and added, and third-party plug-ins supplement Bing.

Establishing a new Microsoft ecosystem may, indeed, be just around the corner.

Although many functions are not online yet, the next update is not far away. Because according to the feedback uploaded by users, Microsoft will make updates and changes every week.

Although very unkind, I really miss @ Google at this moment.

Brother, others have gone to the next Level. What about yours?

Written by: Four Editors: Jiang Jiang & Noodle Cover: Xuan Xuan

Pictures and data sources:

Twitter

Announcing the next wave of AI innovation with Microsoft Bing and Edge

Original title: "NewBing suddenly opened up in an all-round way, and also updated the functions of a bunch of dead friends. 》

Read the original text

　　[Technology] Cars have become an indispensable part of our lives. The combination of steering wheel+shift lever+pedal seems to have become a natural way to control cars, but their respective mechanisms are rarely understood. Take the steering wheel in our hands as an example, the majority of riders are still vague about the common concepts of various steering systems, such as "the difference with hydraulic power" and "what is the variable power", and so on. Below, we will systematically introduce various common steering systems, answer these questions, and discuss the mysteries and mysteries of various steering systems with you.

　

　　Because of the long space, this paper introduces our most common system now, interprets "where does the power come from" and introduces the classification of power steering system.

　　Power steering, as its name implies, is to resist steering resistance by increasing external force, so that drivers can complete steering with less force. It is also called power steering. It was originally designed to make some large vehicles with heavy weight operate more easily, but now it has become very popular. It makes driving easier and easier, and makes vehicles more agile and improves safety to some extent. Power steering can be divided into two categories according to the different sources of power-hydraulic power and electric power.

●

　　The origin of hydraulic power steering can be traced back to February, 1902. Frederick W. Lanchester of Britain invented "Cause the steering mechanism to be actuated by hydraulic power", that is, the hydraulic driving steering mechanism. After that, inventors in the United States and Canada successively registered patents for similar inventions. In automobile production, the commercial production of hydraulic power steering system was first realized, and it was named Hydraguide hydraulic steering system, and it was installed on Chrysler’s sixth generation Imperial in 1951. With the development of technology, the steering system with electronic pump instead of mechanical pump appears, so the current hydraulic power is mainly divided into mechanical hydraulic power and electronic hydraulic power. In addition, the electronic servo hydraulic power steering system is derived from the mechanical hydraulic power.

　

　　Let’s look at the main principle of mechanical hydraulic power steering, which is based on mechanical rack-and-pinion steering mechanism, and adds a whole set of hydraulic system, including liquid storage tank, hydraulic booster pump, mechanical valve connected with steering column, hydraulic cylinder on steering mechanism and the one that can push steering rod, etc.

　　The hydraulic pump provided by mechanical power steering is driven by a belt, which means that the steering pump can only run when the engine is running, which is why the steering wheel power disappears after the engine is turned off. On the steering machine, there is a mechanical valve that can rotate with the steering column. When the steering wheel does not rotate left and right, the pressure in the chambers on both sides of the piston is consistent and in a balanced state. When the steering wheel rotates, the mechanical valve connected to the steering column will be opened or closed accordingly, and the oil on one side will return directly to the oil storage tank without passing through the hydraulic cylinder, and the oil on the other side will continue to be injected into the hydraulic cylinder, so that the pressure difference between the two sides of the piston will be pushed under the action of hydraulic force, and then the auxiliary force will be generated to push the steering rod to steer the wheels, which greatly reduces the force required for us to turn the steering wheel.

　　Another advantage of hydraulic power steering system is to improve comfort and safety. When the wheels jump violently and the tires turn involuntarily when encountering potholes, the vibration can be well buffered and absorbed by the action of hydraulic pressure on the piston, which greatly reduces the vibration transmitted to the steering wheel. At the same time, this structure also improves the safety. For example, when a vehicle using the traditional rack-and-pinion mechanism turns, the tire suddenly changes direction when it encounters a pothole, and the rack will drive the gear to reverse the steering wheel, resulting in the situation of "beater", which is easy to hurt the driver’s hand, so there will be no such problem in a hydraulically assisted vehicle.

　　Mechanical hydraulic booster features:The whole system is a mechanical structure, from the mechanical hydraulic pump driven by the belt to the hydraulic mechanical valve body on the steering column, without any electronic system, with mature and stable technology, high reliability and wide application range. Even if the hydraulic system of the vehicle fails and loses power, it can still rely on the traditional rack and pinion mechanism for steering. Disadvantages are complex structure, large space occupation and high manufacturing cost, which also makes the maintenance difficult and costly. And because the hydraulic pump is driven by the engine belt, it will consume part of the power of the engine, which will affect the fuel economy and the power of the vehicle, especially for small-displacement vehicles with relatively weak power. In addition, the strength of the mechanical hydraulic power-assisted system is not adjustable, so it is difficult to take into account the different requirements for pointing accuracy when driving at low speed and high speed.

● Electro-hydraulic booster

　　The so-called Electro-hydraulic power steering (EHPS for short) has exactly the same principle as mechanical hydraulic power steering, but the biggest difference from mechanical hydraulic power steering is that instead of using a hydraulic pump driven by an engine through a belt, it is replaced by an electric pump.

　　The advantages of electro-hydraulic power assist are firstly reflected in energy consumption. First, the electronic pump driven by electric energy uses the electric energy output by the generator and the battery, and no longer consumes the power of the engine itself. The start and stop of the electronic pump are all controlled by the electronic system. When it is not steering, the electronic pump is turned off, unlike the mechanical hydraulic power assist pump, which is always linked with the engine, further reducing energy consumption.

　　Secondly, the electronic control unit of the electro-hydraulic power steering system can change the power of steering assistance by processing the information of sensors such as speed sensor, lateral acceleration sensor and steering angle sensor, and changing the flow rate of the electronic pump in real time, that is, the function of variable power assistance with speed. Of course, it is not only the electro-hydraulic power assist that can realize the variable power assist with speed. We will introduce various "variable" power assist steering systems in detail in later articles.

　　Electro-hydraulic power assist has been gradually popularized since the late 1990s, and brands such as,,,,, and have models using electro-hydraulic power assist system. We are familiar with, and other models use such a system.

"Triumph, old models and other models use electro-hydraulic power."

　　Why can’t electro-hydraulic assist replace mechanical hydraulic assist?

　　No matter from the aspects of technology, function or economy, electro-hydraulic power assistance has more advantages than mechanical hydraulic power assistance. However, at present, electro-hydraulic power assistance has not been able to replace mechanical hydraulic power assistance for the following reasons:

　　1. The cost of electro-hydraulic booster is higher. Compared with the mechanical hydraulic power-assisted system, after adding the electronic control system and replacing it with the electronic pump, the manufacturing cost of electronic hydraulic power-assisted system is higher, the technology is more complicated, and the difficulty and cost of maintenance are also increased.

　　2. The reliability is not as good as that of mechanical hydraulic booster. In addition to the failure of steering mechanism and hydraulic mechanism, electro-hydraulic power assist also increases the possibility of electrical system failure, so its reliability is not as good as that of traditional hydraulic power assist system.

　　3. The assistance is limited. Although the use of electronic pump has obvious advantages, it needs to be driven by the electric energy of the generator, and the vehicle-mounted generator itself and the maximum current it can provide are limited, so the power of the electronic pump is also limited, and the load it can carry is also limited. Therefore, at present, most of the models that use electro-hydraulic power are medium-sized vehicles. For vehicles that need greater assistance, the electro-hydraulic assistance system is beyond the reach.

　　4. Evolved mechanical hydraulic booster system. With the development of technology, the variable speed function of electro-hydraulic power-assisted system has been realized on the evolved mechanical hydraulic power-assisted system (using solenoid valve body technology), and even a variable speed ratio system has been derived from the mechanical hydraulic power-assisted steering system, so the mechanical hydraulic power-assisted system with higher reliability and load-bearing capacity is still welcomed by manufacturers.

　　Recently, according to the China Youth Daily, "Ginger Soaks Foot" and "Drinking Tea for Beauty" … … With the increasing pressure of life, not only the post-90s generation who entered the workplace, but also many college students have begun to try various methods of health preservation. Health preservation is no longer the exclusive word of the elderly or middle-aged people, and the young campus groups represented by college students are constantly adjusting their lifestyles and advocating a healthier life and rest. Why are this wave of college students "trapped in health care" and "selling the old"? Many college students said that this is a way of "self-mockery" to fight anxiety and pressure.

　　In many people’s cognition, college students are relaxed and chic, and can have fun relatively freely. But in fact, many college students are very bitter and tired now. It is not unusual to do homework, research and activities in class until early morning or even later.

　　Under such a realistic background, it is not difficult to understand that many college students are "trapped in health preservation". Recently, a "2018 Life Consumption Trend Report" shows that based on the search volume of "Lycium barbarum" on the e-commerce platform of all ages, the proportion of search volume after 1995 increased significantly in September 2017. Honey, Lycium barbarum, whey protein, health tea and enzymes are the health foods that are keen on after 1995.

　　When I was in college, I was also a "busy maniac". I was really working hard. My meals and sleep were irregular, and I also had a tendency to overeat. At that time, I thought I was still young, so I indulged myself too much and was indifferent to some early warning signals of my body. But now, nearly a year after graduation, all kinds of physical and mental discomforts have emerged, and I realize that "karma" has come and I want to "pay my debts". Therefore, now I will also force myself to keep fit, such as drinking more hot water, going to massage, eating more healthy food and running to and from work.

　　The meaning of life is not temporary, but long-term. To quote a very fashionable online buzzword recently, "People who work too hard can’t run far". Who doesn’t want to "run away" on the road of life? So, please do it and cherish it.

　　Of course, it is not enough to rely solely on the self-awakening of young people, but also to exert efforts at the social level. To put it bluntly, in addition to focusing on the "burden reduction" of primary and secondary school students, the social level should also focus on the "burden reduction" of young people represented by college students. There is no denying that the latter should be under pressure and responsible, and strive hard to realize their own value and social value, but all this should not be at the expense of health. It should be a social consensus that only a good body and a healthy lifestyle can create more shocking values.

　　Mocheng

Recently, the China Breast Cancer Screening Standard (T/CPMA 014-2020) proposed by China National Cancer Center was published online in chinese journal of cancer prevention and treatment. The correspondent is Professor He Jie, director of National Cancer Center and academician of China Academy of Sciences.

As a common cancer, according to the latest global cancer burden data released by the International Agency for Research on Cancer (IARC) of the World Health Organization in 2020, there were 2.26 million new breast cancer cases in the world in 2020, surpassing lung cancer (2.21 million cases) for the first time, becoming the largest cancer in the world, accounting for 11.7% of new cancer cases. Among the newly diagnosed cancer patients, one in every eight is a breast cancer patient. China is a big country with breast cancer. In 2020, there will be about 420,000 new cases of breast cancer and nearly 120,000 deaths.

Screening, improving the detection rate of early breast cancer and precancerous lesions, and timely and effective treatment are important measures to improve the prognosis of breast cancer and reduce the risk of death. The standards put forward suggestions on the population, measures, results and management of breast cancer screening in China. We have sorted out the relevant contents, hoping to help you better understand the knowledge of breast cancer screening.

Image source: 123RF

Who should have breast cancer screening?

The standard suggests that people at high risk of breast cancer should be screened from the age of 40; The general risk population (all school-age women except the high-risk population) should be screened for breast cancer between 45 and 70 years old.

High-risk population

Women who meet any of the following conditions 1, 2 and 3 are at high risk of breast cancer.

1. Women with genetic family history, that is, women with any of the following: 1) First-degree relatives (mothers, daughters and sisters) have a history of breast cancer or ovarian cancer; 2) Among the second-degree relatives (aunts, grandmothers and grandmothers), two or more people suffered from breast cancer before the age of 50; 3) Among the second-degree relatives, 2 or more have ovarian cancer before the age of 50; 4) At least one first-degree relative carries a known pathogenic genetic mutation of BRCA1/2 gene, or carries a pathogenic genetic mutation of BRCA1/2 gene himself.

2. Have any of the following: 1) Age of menarche ≤12 years old; 2) menopausal age ≥55 years old; 3) Have a history of breast biopsy or surgery for benign breast diseases, or a history of atypical hyperplasia of breast (lobules or ducts) confirmed by pathology; 4) Use hormone replacement therapy of "estrogen and progesterone combination" for not less than half a year; 5) X-ray examination of breast after 45 years old suggests that the type of breast parenchyma (or breast density) is uneven compactness or compactness.

Note: Breast parenchyma types can be divided into fat type, scattered fibrous gland type, heterogeneous dense type (which may cover small masses) and dense type (which reduces the sensitivity of breast cancer detection).

3. Those who have any of the following two items: 1) No breast-feeding history or breast-feeding time less than 4 months; 2) No history of live birth (including never giving birth, abortion or stillbirth) or the age of first live birth ≥30 years old; 3) hormone replacement therapy using only "estrogen" for not less than half a year; 4) Abortion (including natural abortion and induced abortion) shall not be less than 2 times.

Image source: 123RF

How to screen?

General risk population: breast ultrasound examination should be performed every 1-2 years; If you do not have the conditions for breast ultrasound examination, you should use mammography.

High-risk population: breast ultrasound combined with mammography is performed once a year.

How to understand the screening results?

Classification of diagnostic results of mammography

The diagnostic results of mammography are usually classified by the Breast Imaging Reporting and Data System (BI-RADS), which is formulated by American Radiological Society (ACR) and widely used internationally.

1. BI-RADS 0: The existing image failed to complete the evaluation, and other image examinations need to be added.

2. BI-RADS 1: normal, no abnormality was found in mammography. The possibility of malignancy is 0%.

3. BI-RADS 2: Benign findings, with definite benign changes and no malignant signs. The possibility of malignancy is 0%.

4. BI-RADS 3: Benign lesions that may be large. 0% < malignant possibility ≤2%.

5. BI-RADS 4: Suspected malignant lesions, but without typical malignant signs. 2% < malignant possibility < 95%.

6. BI-RADS 4A: low-grade suspected malignancy. 2% < malignant possibility ≤10%.

7. BI-RADS 4B: moderately suspected malignant. 10% < malignant possibility ≤50%.

8. BI-RADS 4C: highly suspected malignant. 50% < malignant possibility < 95%.

9. BI-RADS 5: Highly suggestive of malignant lesions with typical imaging features of breast cancer. Malignant possibility ≥95%.

Image source: 123RF

Classification of ultrasonic diagnosis results of breast

The classification of ultrasound evaluation refers to the screening of National Comprehensive Cancer Network (NCCN) and the BI-RADS classification standard proposed by American Radiological Society.

1. BI-RADS 0: The diagnostic information obtained by ultrasound is incomplete and cannot be evaluated, and it needs to be evaluated after other imaging examinations.

2. BI-RADS 1: negative, no abnormality was found by ultrasound. The possibility of malignancy is 0%.

3. BI-RADS 2: Benign lesions, with definite benign changes and no malignant signs. The possibility of malignancy is 0%.

4. BI-RADS 3: Benign lesions that may be large. 0% < malignant possibility ≤2%.

5. BI-RADS 4: Suspected malignant lesions, but without typical malignant signs. 2% < malignant possibility < 95%.

6. BI-RADS 4A: low-grade suspected malignancy. 2% < malignant possibility ≤10%.

7. BI-RADS 4B: moderately suspected malignant. 10% < malignant possibility ≤50%.

8. BI-RADS 4C: highly suspected malignant. 50% < malignant possibility < 95%.

9. BI-RADS 5: Highly suggestive of malignant lesions with typical imaging features of breast cancer. Malignant possibility ≥95%.

Image source: 123RF

Screening result management

1. BI-RADS 1 and BI-RADS 2 need no special treatment.

2.　BI-RADS 3：

The evaluation of mammography is BI-RADS 3, so it is advisable to reexamine the breast on the lesion side at the next 6 months, and reexamine the breast on both sides at the 12th and 24th months.

If the lesion remains stable, it can continue to be reexamined, and if it has not changed for 2-3 years, it can be reduced to BI-RADS 2. If the lesion disappears or shrinks during the reexamination, it can be directly evaluated as BI-RADS 2 or BI-RADS 1. Biopsy should be considered if suspicious findings are found in the lesions during the reexamination.

The breast ultrasound evaluation is BI-RADS 3, so it is advisable to have breast ultrasound reexamination in 3-6 months, and it can be reduced to BI-RADS 2 if there is no change after 2 years of follow-up.

3. BI-RADS 4A: Further imaging examination and biopsy are needed.

4. BI-RADS 4B: Further imaging examination is needed, and biopsy is appropriate.

5. BI-RADS 4C and BI-RADS 5: Biopsy should be performed.

Image source: 123RF

tag

According to the standard, the breast physiological characteristics and breast cancer epidemic characteristics of women in China are quite different from those in western countries, so we can’t copy foreign experience. Establishing breast cancer screening standards suitable for women in China will play an important role in improving the scientificity, feasibility and practicability of breast cancer screening and reducing the incidence and mortality of breast cancer.

reference data

[1] He Jie, et al.,(2021). China female breast cancer screening standard (T/CPMA 014-2020). chinese journal of cancer prevention and treatment, DOI: 10.16073/J.CNKI.CJCPT.2021.01.02.

[2] Latest global cancer data: Cancer burden rises to 19.3 million new cases and 10.0 million cancer deaths in 2020. Retrieved Nov 16 ,2020, from https://www.iarc.fr/fr/news-events/latest-global-cancer-data-cancer-burden-rises-to-19-3-million-new-cases-and-10-0-million-cancer-deaths-in-2020/

Note: The purpose of this article is to introduce the progress of medical health research, not to recommend treatment schemes. For guidance on treatment plan, please go to a regular hospital.