[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.

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　　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.

　　Authors: Yang Haojie (Ph.D., Institute of Curriculum Textbooks, Ministry of Education) and He Chenggang (Researcher, Institute of Curriculum Textbooks, Ministry of Education)

　　Recently, Publicity Department of the Communist Party of China, together with the Ministry of Education, has published an Introduction to Socialism with Chinese characteristics Thought of the Supreme Leader in the New Era (hereinafter referred to as "Introduction"), which is a key measure to further promote the introduction of Socialism with Chinese characteristics Thought of the Supreme Leader in the New Era into teaching materials, into the classroom and into the mind, to better implement the fundamental task of educating people, and to meet the people’s needs for high-quality teaching materials. The publication of Introduction is an important event in the political life of the party and the country, an important event in the teaching work of teachers and a happy event in the study of hundreds of millions of young students. It is necessary to fully understand the great significance of the textbook Introduction in cultivating people with the innovative theory of the party, guiding young students to establish a correct world outlook, outlook on life and values, and striving to become a new person of the times who is responsible for national rejuvenation, highlighting the word "research" and further using the textbook well.

　　Adhere to the "three bases" and study the teaching materials in depth.

　　Introduction consists of three parts: introduction, 17 chapters and conclusion, which comprehensively reflects the latest achievements of the modernization of Marxism in China, great practice and great changes in the new era, and is a consensus research achievement in academic circles, with authority. The vast number of front-line teachers at all levels and schools in China should study textbooks, not only by reading one step first, but also by studying one level in depth, and even more by understanding one level in detail, so as to get into their minds and hearts.

　　First of all, based on the history of the party’s unity and leading the people for more than a hundred years, we should study the teaching materials comprehensively.Grasp the theme, main line and main content of the textbook "Introduction" as a whole, grasp the theoretical panorama of the latest achievements in the modernization of Marxism in China, and make sure that you really learn, believe and use it.

　　Secondly, based on the great practice and great changes in the new era in the past ten years, we should study the teaching materials in depth.Summarize and clarify the basic context of the textbook "Introduction", strengthen the thinking of historical logic in great practice, realistic logic in great change and theoretical logic in great achievements, so that history, reality and theory can "complement each other" in the textbook.

　　Thirdly, based on the overall situation of the great rejuvenation strategy of the Chinese nation and the unprecedented changes in the world for a hundred years, systematically study the teaching materials.Under the guidance of the Supreme Leader’s Socialism with Chinese characteristics Thought in the new era, we will study and analyze the complex international situation and great risks and challenges we are facing with a developmental vision and a comparative attitude, deepen our understanding of the great struggle, great project, great cause and great dream of the Party leading the people in the new era, constantly enhance our road, theory, system and cultural identity, and strengthen our "four self-confidences".

　　Adhere to the "three unifications" and study textbooks on special topics.

　　The textbook "Introduction" adheres to the educational law, highlights the teaching orientation, pays attention to being close to the cognitive characteristics of young students, and adapts to the acceptance habits of young people. It is an essential book and core textbook for cultivating young students to become builders and successors of Socialism with Chinese characteristics, and has applicability. As the first unified textbook that comprehensively and systematically expounds the Supreme Leader’s Socialism with Chinese characteristics Thought in the new era, colleges and universities across the country should adhere to the "three unifications" to organize special research textbooks, and generally explain the background and actual needs of the unified compilation of textbooks, the framework and theoretical innovation of textbook compilation, so as to provide scientific methodological guidance for teaching courses and using textbooks well.

　　First, we must adhere to the unity of politics and academic rationality.Deal with the dialectical relationship between firm ideals and beliefs and firm truth and beliefs. Believing in truth is the basis and premise of firm ideals and beliefs. Studying textbooks is to profoundly understand the truth power and practical power of Socialism with Chinese characteristics Thought of the Supreme Leader in the new era, strengthen Marxist beliefs, the lofty ideals of communism and the common ideals of Socialism with Chinese characteristics, and further strengthen ideals and beliefs.

　　Second, we must adhere to the unity of value and knowledge.Deal with the dialectical relationship between the principle of reading the original text and learning the course materials. Studying the course materials should be combined with learning the basic principles of Marxism, the principle of reading the original text and learning the "five histories". We should not only learn the main contents of the teaching materials, but also grasp the ideological science system and understand the theoretical philosophy of truth contained in the Supreme Leader’s Socialism with Chinese characteristics Thought in the new era.

　　Third, we must adhere to the unity of theory and practice.Dealing with the dialectical relationship between theoretical guidance and practical development, the purpose of learning is to apply it, and to talk about the theoretical value of Socialism with Chinese characteristics Thought, the supreme leader in the new era, guiding practical development to achieve historic changes and achievements in detail, so as to enhance the sense of practical acquisition, ability improvement and motivation of young people in the new era.

　　Adhere to the "three focuses" and organize research teaching materials

　　Introduction is an important achievement in promoting the construction of the teaching material system of philosophy and social sciences with China characteristics, which reflects the requirements for the integrated education of ideological and political courses in universities, primary and secondary schools, and provides a model for strengthening the construction and management of teaching materials in the new era. The professional research platform of national curriculum textbooks, the key research bases of textbook construction and the textbook research institutions in colleges and universities should gather capable forces to study the textbook Introduction, focus on the major theoretical and practical problems of textbook construction, sort out and summarize mature experiences, summarize and refine basic laws, and promote the construction of a high-quality textbook system to serve and support the high-quality development of education.

　　First, focus on the innovation of teaching material construction mechanism,Carefully sort out all the links in the whole process of management research for editing and reviewing the textbook Introduction, and study the innovative practices and effective experiences in the mechanism of the textbook Introduction from the aspects of writing needs, implementation plan, team formation, discussion and review, publication and use tracking, so as to create an era model for the construction and management of the textbook.

　　Second, focus on the realization of teaching materials to educate people.Accurately grasp the functional orientation of the textbook "Introduction" to cultivate new people in the era, and study the core leading role of the textbook "Introduction" in curriculum integration, teaching integration, evaluation integration and goal integration according to the requirements of ideological and political courses integration in universities, primary and secondary schools, so as to lay the foundation for the realization of all-round education, whole-process education and all-round education.

　　Third, focus on the construction of teaching material discourse system,Fully understand the theoretical value of "Introduction" as an important achievement in the construction of teaching material system of philosophy and social sciences with China characteristics, accelerate the strategic goal of building a discourse system of philosophy and social sciences with China characteristics by benchmarking, study the active exploration of teaching materials in the construction of Marxist discourse system with China characteristics and times, and gradually highlight the China characteristics, China style and China style in the construction of teaching material discourse system.

COVID-19 is still spreading around the world, and prevention and control will become the norm. How to prevent and control it efficiently and finely, and minimize the impact on people, maybe we can make a fuss about health codes.

Now the function and significance of various health codes is actually mainly to provide data by big data statistics. But not fine enough. There are mainly the following problems:

• How to ensure the authenticity of information
• People in high-risk areas are not necessarily high-risk, so high-risk areas should not be divided, but high-risk people should be defined.
• Only people who are in close contact with the confirmed patients are high-risk people. It is most important to inform these people in time and check them out.
• The core of prevention and treatment of infectious diseases is early detection and early isolation. How to find it and isolate it as soon as possible is the most important thing.

Universal testing, screening out all patients, and then centralized treatment, this is the most ideal method. However, based on the actual situation, it is more difficult to realize this. Then set up more detection links, such as the temperature detection of residential buildings, which is this role. When the abnormality is detected, further nucleic acid detection will be conducted. If the diagnosis is confirmed, all close contacts will be screened again to find the car infected person. This should be done quickly and accurately. You can realize all accounts receivable, and you should check everything.

National epidemic prevention requires a national epidemic prevention system. Everyone and each unit play different roles in the whole system. These categories are probably needed in this system:

• Brain center cloud computing platform:Such a large amount of data and responsible data storage certainly need a powerful data storage and technical platform, and China, which has experienced the test of Spring Festival travel rush and the Double Eleven, is not lacking in this ability.
• All-round primary inspection:This requires our Zu Guoqiang’s strong organizational ability to do a good job of detection at every small, building subway and other personnel flow nodes. The main function is to find people with fever and abnormal health codes, and send them for inspection in time if abnormal conditions are found. Do early detection and early isolation.
• Nucleic acid detection:Rapid and convenient detection can expand the detection range. In South Korea, PCR nucleic acid detection method was adopted on January 31st, and the diagnosis result can be obtained in 6 hours. The "drive-through" detection station can detect about 380 people every day. This practice can quickly deal with a large number of testers and effectively reduce the contact between medical staff and high-risk groups. It used to take 30 minutes for each person to test, but now it only takes 10 minutes to complete. This may be used for reference.

Face recognition real name login:Nowadays, whether it is the card opening of financial banks or the real-name authentication of the three major operators, remote face recognition verification has been realized, and the uniqueness of the national ID cards provides a data basis for face recognition. Relying on the camera of smart phone, face recognition login is completed. Thereby ensuring the correctness of the information. Face recognition login+mobile phone verification code. Don’t enter complicated information such as the place of entry, the place of household registration, and the place of residence.

Close contacts real-time storage:Fine epidemic prevention is to accurately find infected people and close contacts with confirmed patients. Now the way to find close contacts is too rude. One person is diagnosed, the whole building belongs to close contacts, and someone in a train is diagnosed and needs close contacts to check the relevant trains themselves. This greatly misses these potential threat groups. Or accidentally injure someone who is not really close to you. Using the Bluetooth technology of mobile phone, you can search for additional Bluetooth devices in real time and upload them for filing. Bluetooth can search for devices within 10-20 meters, and record the contact time of storage devices and the MAC address of devices. Within 10-20 meters, those who have been in contact for more than 60 seconds are close contacts in the true sense.

Real-time location information:The record of real-time location information of mobile phone can tell you where you have been in contact with close contacts when pushing information, and provide information judgment for self-infection rate through self-judgment of personal protective measures at that time.
Real-time push of abnormal information: when someone in close contact with an individual is diagnosed on the 14th, the mobile phone will automatically push the message. The message template involves the following information: time, place, number of contacts, contact duration, and the nearest nucleic acid detection point.

For example:

Hello; At 3:50 p.m. on April 6, 2020, a confirmed patient met with you for about 10 meters for 300 seconds near Chaoyangmen subway in Chaoyang District, Beijing.

Now the nearest nucleic acid detection point is the outpatient department of Chaoyang Hospital. It is recommended that you do a good job of protection and see a doctor immediately.

There are only two states of health code, no abnormality and abnormal. Face recognition login shows the status, which will be invalid after 1 minute. You need to log in again. All residential buildings only need to check the health code, and if there is any abnormal state, they will not pass, and urge them to do nucleic acid testing. If the testing is negative, the hospital data will be restored to no abnormal state after synchronization.

Exception definition:Within 14 days, if there is a confirmed case in the Bluetooth information record, it will be displayed as abnormal.

Eliminate anomalies:Go to the hospital for nucleic acid detection. If it is negative, the hospital data will be uploaded and the abnormal state will be automatically lifted. If it is positive, the system will automatically inform the user to contact the confirmed user, and then inform the contacted user to do nucleic acid testing.

At present, the health code is too rough, and the overall structure is centralized. From top to bottom, it lacks a dimension, that is, information communication between groups. Adding this dimension can realize timely tracking and timely push, and the whole process is more automated, reducing a lot of manual intervention.

To prepare for a protracted war, make full use of existing technical means, give full play to data intelligence, and fine epidemic prevention means to minimize the impact on personnel activities on the premise of accurate positioning. I didn’t mention the issue of data security in the whole article because we can’t give up eating because of choking at this stage. The whole design is still described by big lines. If you have any shortcomings, please brainstorm and comment.

Lao Zhang, everyone is a product manager columnist. AI product manager, focusing on natural language processing and image recognition. Now he is a partner of smart insurance startup company, hoping to communicate with entrepreneurs in the field of artificial intelligence.

This article was originally published by everyone as a product manager, and it is forbidden to reprint without permission.

The title map comes from Unsplash and is based on CC0 protocol.

　　Xinhua News Agency, Beijing, October 8 (Reporter Gao Jing) During the National Day holiday this year, Gao Lei, who works in Beijing, found that his hometown had changed a lot when he went home to visit relatives. Gaoyang County, Baoding City, Hebei Province, where his hometown is located, is undergoing the transformation from coal to gas. Gao Lei saw that the small coal-fired boiler used for heating in winter at home disappeared, and the kitchen was newly connected with natural gas pipelines and installed with wall-hung boilers. The home looked much cleaner and brighter than before.

　　Replacing loose coal by changing gas and electricity is one of the important measures to control air pollution in northern China.

　　Since the "Thirteenth Five-Year Plan", China’s air pollution control has achieved remarkable results. According to the data from the Ministry of Ecology and Environment, compared with 2015, the average annual concentration of fine particulate matter (PM2.5) in cities at or above the prefecture level fell by 23.1% in 2019, and the proportion of excellent days in 337 cities at or above the prefecture level reached 82%.

　　In the closing year, the achievements of the blue sky defense war were even more eye-catching. From January to August this year, the average number of excellent days in 337 cities at or above the prefecture level was 86.7%, up 5 percentage points year-on-year; The concentration of PM2.5 was 31 μ g/m3, down 11.4% year-on-year. Good weather with blue sky and white clouds is becoming the norm.

　　Behind more and more blue sky is a series of "combination boxing" that China has played to control air pollution. In recent years, China’s air pollution control work has been closely focused on key areas such as Beijing-Tianjin-Hebei and surrounding areas, the Yangtze River Delta region, and the Fenwei Plain, focusing on key pollutants such as PM2.5, focusing on key periods in autumn and winter, and key areas such as loose coal combustion and "scattered pollution" enterprises, and continuing to implement tough actions.

　　The pilot cities of clean heating in the northern region will achieve full coverage of Beijing-Tianjin-Hebei and surrounding areas and Fenwei Plain; 86% of coal-fired power units have achieved ultra-low emissions, and about 780 million tons of crude steel production capacity has been transformed into ultra-low emissions; Carry out in-depth rectification of "scattered pollution" enterprises, industrial furnaces and key industries to control volatile organic compounds; Strengthen the pollution control of diesel trucks and vigorously promote the "revolving iron"; Deepen the joint prevention and control of air pollution in key areas and strengthen the response to heavy pollution weather.

　　"The nearby village used natural gas for heating last year, which is said to be clean and warm." Gao Lei said that he believes that after coal is changed to gas, there will be more blue sky and less smog in winter.

　　CCTV News:On the afternoon of April 8, the State Council held a press conference on the traceability research of COVID-19 in China.

　　At the press conference, a reporter asked: What kind of cooperation plan will China have with the international community in the future regarding the investigation and research on traceability? Are there any specific international cooperation arrangements or plans?

　　Zhou Lei, a researcher at China CDC, responded that Covid-19’s traceability is not a matter for one country, nor can it be accomplished independently by one country. It necessarily requires the joint efforts of the global scientific community. Therefore, it is imperative for the whole world to unite, especially for scientists to work together to carry out traceability, which is also necessary and what we have always advocated. We are adhering to an open, objective, scientific and open attitude to cooperate with WHO. We have also invited international experts many times. For example, since 2020, we have invited at least two international experts to China to carry out traceability research. I think this will not change in the future, which is certain.

　　In fact, just now, several of my colleagues have repeatedly mentioned that the first phase of our joint research cooperated with more than 10 international colleagues and top international experts selected by WHO to carry out joint research work, and formed a particularly detailed joint research report for joint release. This is an attitude in itself, and this is our research result. After that, we didn’t stop our research work, and our expectation and efforts to trace the source never stopped. A large number of research results and data we carried out in the later period were shared with our international counterparts in various forms without reservation. We published many scientific papers, shared our sequences and shared our data and information in multiple databases. In addition, we supported the decision of WHO to conduct global joint traceability. We sent experts to collect more data and information, and we have been doing what China can do. In fact, we very, very much hope that global traceability can really become a global traceability. We have repeatedly called for the location and angle of traceability research to cover all possible countries and regions as much as possible, and we should stop speculating and paying attention to Wuhan all the time. We have done a lot of work in this regard, and I have reiterated this many times. China’s attitude has never changed. Traceability research should be an international action. We also very much hope that WHO is an authoritative professional organization and international organization, which can really organize the global traceability work and organize all the elites in the international scientific community with a scientific, rigorous and fair attitude.Let us trace back to Covid-19 and get a convincing answer in the future.

Citizens are buying TV sets (photo by reporter Gao Qian)

The public is buying a refrigerator (photo by reporter Gao Qian)

　　Editor’s Note: A few days ago, the Provincial Department of Commerce and other 19 departments jointly issued the "Implementation Plan for Promoting Trade-in of Consumer Goods in Henan Province", which will focus on the implementation of three major projects: trade-in of automobiles, trade-in of household appliances and "rejuvenation" of home improvement and kitchen and bathroom. As soon as this news came out, it was widely concerned by consumers. What are consumers’ expectations and concerns? What is the situation of the consumer market? The reporter interviewed this.

　　New kinetic energy-

　　Find a "home" for waste materials

　　In life, many people have seen such a scene in residential areas: old toilets, old furniture, waste household appliances, etc. are abandoned beside the trash can, waiting for someone to take them away. What should I do with these big household items? Is there a smooth recycling channel? Yesterday, the reporter started an interview.

　　The netizen had the experience of handling large household items. He told reporters that his old house needed to be renovated and he wanted to get rid of some old things. But because of the high floor and no elevator, things were bulky and heavy, and many masters who collected waste products were unwilling to pick them up. Selling these things not only won’t get money, but also requires paying a "disposal fee". "In the end, I had to bundle things that can still be used at home and can be sold with these items, and some people reluctantly agreed to clear them." This netizen is emotional.

　　With the continuous improvement of living standards, citizens’ demand for integrated upgrading of large household items is constantly increasing, and where to go for the eliminated large household items has become a difficult problem. "The public area in the hospital is limited. If these large items are discarded in the hospital, it will not only occupy the road, but also increase the burden on sanitation workers. I feel guilty in my heart, and I am afraid of causing conflicts in my neighborhood. I really hope that the relevant departments can provide a’ home’ for the eliminated household items. " The netizen said "the flag is victorious". "The electronic components in some household appliances will release harmful substances after aging and expiration, causing invisible harm to the human body." Ms. Shi, who is engaged in the environmental protection industry, said that she had done market research, and many residents did have the demand for recycling large household items.

　　The reporter learned that due to the lack of convenient recycling points, these eliminated large household items were either discarded at will or dismantled by some illegal dismantling points. An old man who walks the streets to recycle old household appliances told reporters that these old things are worthless, and washing machines, old computers, etc. are tens of dollars regardless of good or bad. Dealing with these things takes up space and time, and he takes them back and sells them in parts.

　　Previously, the relevant ministries and commissions of the state jointly issued the Notice on Encouraging Household Appliance Manufacturers to Carry out the Action of Responsibility System for Recycling Targets, and put forward a series of policies to encourage household appliance manufacturers to implement recycling. Nowadays, many home appliance manufacturers are carrying out "trade-in" activities, and some enterprises can even provide disassembly services for free.

　　For a long time, the recycling level of large household items is low, the management is not standardized, and the necessary recycling facilities are lacking. The "last mile" of recycling has never been opened. Recently, the Henan Provincial Department of Commerce and other 19 departments jointly issued the "Implementation Plan for Promoting Trade-in of Consumer Goods in Henan Province", which mentioned that the recycling network of household appliances should be upgraded, and the construction of recycling outlets, sorting centers, dismantling facilities and other projects should be supported to improve the efficiency of recycling, transit and distribution. The staff of an environmental protection enterprise in our city told the reporter that they have paid attention to this problem and are considering establishing a recycling channel and management system with some qualified enterprises to realize the reduction, harmlessness and resource disposal of large household items.

　　Automobile energy conversion-

　　Double subsidies are more favorable.

　　Automobile consumption is an important part of household consumption. At present, the automobile trade-in project has begun. What is the trend of the consumer market? What new weather has it presented? On May 11th, the reporter went to the automobile market in northern Henan for an interview.

　　There are used car trading places in the market, and more are new car sales stores. In a new car sales store at the entrance of the market, different styles of cars are parked. Duan Wenbin, the manager of the automobile sales and marketing department, is sorting out the automobile sales information. He said: "The new round of automobile trade-in has begun, which will definitely drive the automobile market consumption. We have prepared enough sources to meet the diversified needs of consumers as much as possible."

　　On May 7, the "Implementation Plan for Promoting Trade-in of Consumer Goods in Henan Province" jointly issued by the Provincial Department of Commerce and other 19 departments mentioned that from May 7 to the end of this year, individual consumers will be scrapped with fuel vehicles or new energy passenger vehicles with national emission standards of Grade III and below, and they will be subsidized by 10,000 yuan for purchasing new energy passenger vehicles; For individual consumers, the fuel vehicles with national emission standards of Grade III and below will be scrapped, and the fuel passenger cars with a displacement of less than 2.0 will be subsidized by 7,000 yuan. At the same time, cities and counties are encouraged to give subsidies to consumers who replace old cars with new ones, and the provincial finance will give appropriate awards; Encourage automobile production enterprises and sales enterprises to independently carry out second-hand car replacement subsidies and superimposed preferential profit-making activities.

　　"In fact, we have always had replacement subsidies for car buyers. Old cars are exchanged for new ones, cars of the same brand are subsidized by 5,000 yuan, and subsidies of different brands are 3,000 yuan. Consumers can enjoy subsidies as long as they provide transaction tickets." Duan Wenbin said that now, government departments also have subsidies, coupled with corporate concessions, consumers can save a lot by exchanging old ones for new ones.

　　What style of car is more popular with consumers? Duan Wenbin pointed to a small new energy passenger car and said, "It must be a new energy passenger car, especially this small one, which saves energy and is convenient to park in the urban area." Yan Dong, a staff member of an automobile sales department who specializes in selling new energy passenger cars, also told reporters: "It is precisely because of the good market prospects of new energy passenger cars that the manufacturers we sell cars changed from fuel vehicle production to new energy passenger car production last year. Moreover, adding intelligent technology and intelligent management, such as autonomous driving technology, to new energy passenger cars is very popular among young consumers. "

　　Cui Zhifeng, a consumer who has transferred to several car stores, is a "post-00" and is preparing to change to a new car. He said: "New energy vehicles are the first choice. I prefer to be intelligent and have a better driving experience. Let’s take a look around today and exchange our old car for a new one in a couple of days. "

　　How to apply for car trade-in subsidy? The reporter learned that consumers can enter the application through the website of the "National Automobile Circulation Information Management" system or the "Car Trade-in" applet.

　　Replacement of home appliances-

　　Merchants let the market get hot.

　　"Trade-in" is not a new term for the home appliance market. The difference is that more businesses have joined the trade-in activities this year. On May 11th, the reporter visited some appliance stores in our city.

　　The reporter saw that many merchants have advertised "trade-in", and almost all the home appliances in the store have billboards. In the corridors and aisles, the slogan of "trade-in" can be seen everywhere. A staff member told the reporter: "Many commodities can be’ trade-in’. This year, there are more commodities participating in the activities and the publicity is stronger. Generally speaking,’ trade-in’ can be deducted from 200 yuan to 300 yuan, and you can participate in activities regardless of the brand or quality. Some merchants don’t even take away the old machines, and then make profits for consumers. "

　　The reporter found that in addition to trade-in, merchants also launched other promotional activities, and some brands launched "group purchase coupons" benefits. After consumers receive coupons online, they can also purchase new products by superimposing in-store promotional activities; Some brands offer services such as "10-year warranty" and free cleaning; Some products focus on intelligence, and users can control them remotely by connecting their mobile phones. Nowadays, intelligent household appliances such as "washing machine+dryer", dishwasher and sweeping robot have entered more and more families. A salesperson told the reporter: "According to the needs of consumers, merchants will launch different products, some of which are economical and applicable, and some of which can meet the needs of high-quality life, but overall, green and energy-saving products sell best."

　　"Come in and have a look, this is our new TV set. Its biggest highlight is’ seamless adsorption’, separated design and stereo surround, and the picture and color are even less, which can meet the needs of family viewing. " The clerk said to the consumers who are buying TV sets, "The promotion activities during the May 1 ST period are still going on. As long as they really want to buy them, the price can be negotiated again." "Now many consumers value cost performance, and similar products with low price, good quality and high energy efficiency are more popular." A citizen who just bought a TV set told reporters.

　　So, which home appliances do consumers most want to join the trade-in activity? The reporter learned that some consumers hope that the trade-in activities of large household appliances such as refrigerators and washing machines should be implemented so that consumers can really get benefits. Another part of consumers said that the upgrading speed of large household appliances is slow, and it is more affordable for small household appliances to join the activities. "Before replacing the old electric baking pans at home, 50 yuan changed the price for a new one. Small household appliances are broken, which costs a little more to repair, but it is a pity to throw them away. This kind of activity is quite good. " Citizen Gao Min said. Ms. Dong, a citizen, said that there are many broken small household appliances at home. If different types of small household appliances can be exchanged for each other, it would be better to buy the products they need.

　　Home improvement kitchen and bathroom "rejuvenation" new-

　　Green, intelligent and energy-saving become the first choice.

　　With a gentle kick, the toilet lid automatically rises, freeing hands; With a wave of your hand, the range hood hidden in the hanging cabinet can be lowered; Remote control operation, the mattress bends into an S-shape, which makes the body fit and relax … Nowadays, green, intelligent and energy-saving products emerge one after another in home stores. Will the home market be "rejuvenated" with the current trade-in craze? On May 13th, the reporter visited some home markets in our city.

　　On the morning of the same day, in a home improvement building materials market in the middle section of Wenming Avenue, the reporter met Ms. Niu, a citizen. "I just bought a new house for my child in March this year, and now the hard clothes will end immediately." She is consulting the whole house customization and told reporters. After a few days of shopping, she realized that there are a lot of wardrobe plates, such as density board, particle board, pine board, multilayer board and solid board, which are dazzling. "The child will get married at the end of the year, so in the choice of building materials, my biggest requirement is that the environmental protection level should be high. This is the case with wardrobes and cabinet plates, as well as the previous latex paint."

　　In addition to the popularity of green building materials, smart and energy-saving products have also become popular choices for consumers. In a bathroom shop on the first floor of the building materials market, the latest smart toilets were put in a conspicuous position. "At present, the best selling in our store is the smart toilet. In the past, most young people liked it, but now the customer base is wider. Many middle-aged and elderly people change their clothes and choose smart or light smart toilets. " Zhi Hong, a salesperson of the store, introduced it. Now the smart toilet is no longer "unattainable". You can buy a light smart toilet with heated seat and automatic lid lifting for more than 2,000 yuan, and the price is similar to that of ordinary toilets. "Our smart toilets and light smart toilets are both water-efficient secondary, and its sensing device will discharge water according to the load-bearing time, providing consumers with quality life and saving water at the same time." Zhihong said.

　　Kitchen and bathroom is the core area of the family and an important functional area. In addition to the renovation of new houses, many consumers who renovated old houses also started from the renovation of kitchen and bathroom. Ms. Gao, who lives in the Laker Triangle, originally bought a second-hand house, which was already decorated when she bought it. "I didn’t redecorate because of the limited budget. Now that I have a little more money, I want to clean up the kitchen. " Ms. Gao, who is choosing a gas stove, said that at present, the cupboard has been replaced at home, and then a set of more energy-efficient stoves and range hoods should be selected.

　　During the interview, the reporter learned that some businesses have launched trade-in activities, and at the same time, businesses are still continuing the "May Day" discount and various combination package promotions. "I saw the trade-in implementation plan issued by the province on the Internet, and I hope that businesses can launch related activities as soon as possible. In this way, the merchants will make some profits and the government will subsidize them. We can also upgrade our consumption and enjoy a higher quality smart home. " Ms. Niu said.

　　What did you get in exchange for the old one?

　　A few days ago, the Provincial Department of Commerce and other departments jointly issued a document to promote the full implementation of trade-in of consumer goods in Henan Province, focusing on the implementation of three major projects: trade-in of automobiles, trade-in of household appliances and "rejuvenation" of home improvement and kitchen and bathroom. Our city is also promoting this work. What changes have been brought to our production and life by the trade-in of consumer goods?

　　Trade-in of consumer goods has brought about an improvement in people’s quality of life. In the new round of trade-in activities of consumer goods, the new products replaced tend to be new energy passenger cars, green smart home appliances, smart electronic products, smart homes and other new products. These new products focus on green and intelligence, bringing convenience and intelligence to people’s lives, especially some aging smart products, which enhance the well-being of the elderly. Trade-in of consumer goods leads the new consumption fashion and improves the quality of life of the people.

　　Trade-in of consumer goods has brought a new look to the consumer market. Consumers can exchange old products for new ones and enjoy a certain amount of subsidies at the same time. Subsidies stimulate market consumption, which is bound to set off a new round of consumption boom. Consumer goods, such as automobiles, home appliances, home improvement, kitchen and bathroom, which are included in this trade-in subsidy, are an important part of residents’ consumption and are also bulk consumer products. Subsidies from government departments and concessions from some enterprises will certainly stimulate the consumer market and then set off a consumption boom.

　　Trade-in of consumer goods brings about the recycling of resources. At present, after automobiles, household appliances, home improvement, kitchen and bathroom and other household products are abandoned, some residents can’t find special recycling channels, and waste products will be littered, which may bring pollution to the environment. After the unified recycling of waste products, possible environmental pollution is avoided, moreover, waste resources can be recycled, and the quality and level of economic cycle are greatly improved.

　　Trade-in of consumer goods has brought about high-quality economic development. Green and intelligence are the vane of the consumer market. Stimulated by the trade-in policy, green and smart products favored by consumers are bound to be popular. This is conducive to promoting investment and promoting enterprises to produce more green and intelligent products, thus promoting the continuous increase of the proportion of advanced production capacity and bringing more high-quality durable consumer goods into residents’ lives. This can also promote local industries to climb "high", make efforts to "new", go "green" and make great strides towards high-quality development.

　　Trade-in of consumer goods has brought a new look to consumers’ life and consumption market. Relevant departments of our city should speed up the introduction of relevant policies so that consumers can enjoy the policy dividend as soon as possible and bring new atmosphere and changes.

　　(Reporter Deng Wei, Gao Qian, Li Hui)

A single mother with cancer turned to the government for help. Source: Leader Message Board official website screenshot

　　Recently, a single mother suffering from cancer in Changgou Village, Dashuiquan Town, Xinglong County, Chengde City, Hebei Province left a message on People’s Daily Online "Local Leaders Message Board" asking for help, hoping that the government could help her find a rescue agency to raise and take care of her adopted daughter with intellectual disability.

　　The Social Situation and Public Opinion Office of Chengde Municipal Committee has replied at the bottom of the message board that the relevant units of Chengde Civil Affairs Bureau and Xinglong County have carefully checked. After active coordination, relevant issues have been properly solved.

　　On July 5, a staff member of the Civil Affairs Bureau of Xinglong County, Chengde City told The Paper that at present, the child has been sent to Chengde Welfare Institute, which is responsible for his daily life; The mother of the child still needs regular medical treatment. At present, in view of the above situation, relevant problems have been arranged to be solved.

　　On July 5th, a staff member of Xinglong County Party Committee Office told The Paper that the mother was divorced, suffering from advanced cervical cancer, and her adopted child was mentally disabled. A month ago, they raised about 6,000 yuan for it and have completed the last phase of chemotherapy. At present, the mother is in good health and will be reviewed in three months. "The follow-up cost is not very high. She is now working with her friends and earning a little money. There is nothing wrong with life at present. " The staff member said that in the next step, after her body recovered, the mother was going to set up a stall in the market.

　　The above-mentioned staff said that they would continue to follow up her physical condition and provide corresponding help.

　　The staff member also mentioned that at first, the mother had no time to rest because she needed to take care of her children alone for 24 hours. She thought she had no hope of recovery, so she gave up treatment and went through the procedure of donating her body. At present, the child has been arranged to be taken care of by Chengde Welfare Institute. He said that local volunteers will also be regularly organized to go to the welfare home with the mother to see the children.

　　On the same day, a staff member in charge of subsistence allowances in Xinglong County said that they had raised the low premiums of mother and daughter to the highest standard. Originally, the mother’s monthly fee was 245 yuan, and the daughter’s monthly fee was 255 yuan. Now, both of them have been raised to 400 yuan per person per month.

　　The Paper noticed that the aforementioned single mother wrote on the message board that in 2006, she lost her fertility due to tubal blockage and ectopic pregnancy surgery; In 2013, her mother adopted a baby girl from a pair of Tianjin parents under the age of 18. Subsequently, the baby girl was raised by her, but unfortunately she suffered from encephalitis, which caused secondary mental disability. To this end, she borrowed 300,000 yuan to treat her children.

　　She also wrote that she divorced her husband in 2019. Because the opposite sex was not related by blood, her ex-husband could not be the guardian of her adopted daughter alone, and the court awarded her custody of the child. The child is 9 years old this year. He can’t take care of himself and needs long-term care. In July 2020, she was diagnosed with advanced cervical cancer. After radiotherapy and chemotherapy, she is still receiving follow-up treatment. However, because she found it too late to surgically remove the lesion, she was extremely weak and thus lost her ability to work.

　　"Give the child a chance to live when I have to say goodbye to this world." The single mother wrote.

　　　　　　 CCTV News:The United Nations Security Council unanimously adopted a resolution on the DPRK on the 22nd, and decided to impose more severe sanctions on the DPRK.

　　　　　　 The new sanctions resolution was drafted by the United States, including requiring North Korea to reduce the annual import volume of refined oil from 2 million barrels to 500,000 barrels, the annual import volume of crude oil should not exceed the upper limit of 4 million barrels, and North Korea’s overseas workers should be repatriated within a limited period of time.

North Korea tests missiles (data map)

　　　　　　 This is the tenth time that the Security Council has adopted a resolution on sanctions against North Korea’s nuclear program since 2006.

　　　　　　 [Ministry of Foreign Affairs of China] I hope that all parties concerned will implement the resolutions related to the DPRK in a comprehensive and balanced manner.

　　　　　　 Answering a reporter’s question about China’s comment on this resolution, Hua Chunying, spokesman of South China’s Foreign Ministry, said: On December 23rd, the Security Council unanimously adopted resolution 2397 in response to the launch of an intercontinental ballistic missile by North Korea in November. The resolution moderately strengthens sanctions against the DPRK, while stressing that it should not have adverse humanitarian impact on the DPRK civilians, normal economic activities and cooperation, food aid and humanitarian assistance, or the activities of diplomatic missions in the DPRK, reaffirming the maintenance of peace and stability on the Korean Peninsula and Northeast Asia, calling for peaceful, diplomatic and political solutions to the problem, supporting the resumption of the six-party talks, and stressing that all parties concerned should take measures to reduce the tension on the peninsula. China hopes that all parties concerned can implement the Security Council resolutions related to the DPRK, including Resolution 2397, in a comprehensive and balanced manner, and promote the peaceful settlement of relevant issues on the peninsula.

　　　　　　 As a close neighbor of the Korean peninsula, China pays close attention to the development of the situation on the peninsula, and always adheres to the position of realizing the denuclearization of the peninsula, maintaining peace and stability on the peninsula, and solving problems through dialogue and consultation. This is our consistent position in dealing with the DPRK nuclear issue and related issues, including participating in the deliberations of the Security Council. At present, the situation on the peninsula is complex and sensitive. China calls on the countries concerned to exercise restraint and make active efforts to ease the tension on the peninsula and properly solve the peninsula problem. We also hope that all parties concerned will actively consider the "double suspension" initiative and the "two-track parallel" idea put forward by China, work with China to promote dialogue and consultation, and make efforts to promote the denuclearization of the peninsula and achieve peace and stability on the peninsula.