According to the Regulations on the Management of Electric Bicycles in Zhejiang Province, non-new national standard electric bicycles are not allowed to drive on the road from January 1, 2023.

Is your electric car up to standard?

What should I pay attention to when buying an electric bicycle?

Let’s take a look at this evaluation report.

involve

Yadea, Emma, Tailing, Luyuan

Xinri, Lima, Mavericks, No.9

Eight famous brands of electric bicycles, etc.

Recently, Zhejiang Consumer Protection Committee, Jinhua Consumer Protection Committee and Yongkang Consumer Protection Committee jointly released the comparative test results of electric bicycles.

Basic information of 8 electric bicycle samples

01.

National standard safety projects are all qualified.

In the speed limit, size limit

Among the 12 items such as vehicle quality and short circuit protection,

According to the standard test results.

All 8 sample cars are qualified.

Inspection of safety projects according to GB17761—2018 standard.

02.

The cruising range of Luyuan and other two cars is cost-effective

Endurance is mainly reflected by the ratio of measured cruising range to declared cruising range and the ratio of unit price to measured cruising range.

This experiment simulates a cyclist of about 75 kg riding on a slightly undulating asphalt road, from full charge to riding until he can’t ride.

Luyuan, Yadea, Tailing

The two ratios of the three sample cars are low.

It means that the cost performance is higher.

Summary of cruising range test

▲ There are many factors that affect the cruising range. The test data is for reference only.

03.

Luyuan and No.9 cars have good braking performance.

Sensitive and efficient braking performance is an important guarantee for riding safety, and braking distance is an intuitive embodiment of electric bicycle braking performance.

This braking performance test is mainly conducted according to Clause 6.1.2 of GB17761—2018. The test site is asphalt pavement, and the tester adds a counterweight to 75kg, and the tire pressure is 250kPa.

The test results show that:

The braking distance of two sample cars of Luyuan and No.9 is 3.3 meters, which tied for the first place;

Followed by the bell, 3.4 meters;

Emma, Mavericks and Nippon Sample Cars rank at the bottom, with 4.2m, 4.4m and 4.5m respectively.

Summary table of braking distance of each brand sample model

04.

The performance of two cars, Lima and Xinri, was at the bottom.

Riding comfort is mainly considered from several aspects, such as the comfort of speed bump, acceleration smoothness, steering control accuracy (especially low speed control) and the continuity of power output at the highest speed.

The six models purchased this time, such as Luyuan, Emma, Yadea, Lima, Tailing and Xinri, are simple models, with relatively cheap prices and simple functions, only with the function of starting the P-file.

Two vehicles, such as No.9 and Mavericks, are non-simple models with relatively high prices and rich functional configurations.

In the experiment, 8 testers each experienced 8 sample cars continuously to get a sense of riding experience. The test roads are flat asphalt pavement, pavement with many obstacles such as yellow mud and stones, and auxiliary roads with potholes. Testers ride according to the established route and score according to the dynamic performance of the vehicle.

Summary table of riding comfort test for simple models

▲ Lima, Xinri sample car

Summary table of riding comfort test for non-simple models

▲ No.9, calf sample car

05.

The "three guarantees" policies of different brands are different.

The manufacturer’s "three guarantees" policy for the motor, battery, controller, frame and other major parts of electric bicycles is one of the important indicators to measure after-sales service. The "Three Guarantees" policy for major components is mainly based on the official homepages or after-sales telephone numbers of various brands. Among them:

The "three guarantees" policy of Lima brand sample car is provided by the official service after-sales personnel of the manufacturer;

The other seven companies all inquired from official website. For details, please refer to the official websites of all brands.

Summary table of "Three Guarantees" of main components of each brand sample model ▼

There is no mandatory requirement for turn signals and rearview mirrors in national standards, and none of the electric bicycles purchased this time are equipped with turn signals and rearview mirrors. However, it can be found that turn signals and rearview mirrors are necessary in daily riding. Jinhua Consumer Protection Committee suggested that this aspect can be improved. (Chart data source: Jinhua Consumer Protection Committee)

Consumer reminder

Pay attention to check the saddle length.

01

Rational selection of vehicle types

Select the vehicle type according to the budget and usage scenarios, and ensure that the selection matches your own needs.

02

Check CCC certification mark

It is suggested to choose an electric bicycle brand with high popularity and good reputation; Inquire about the "three guarantees" period of products and the number of local after-sales service outlets to facilitate later maintenance; Check the CCC certification mark of the vehicle, and check the consistency between the certificate and the overall appearance of the vehicle, especially the saddle length. If there is a big discrepancy, it may be that the dealer is suspected of unauthorized modification, which may seriously affect the riding safety of electric vehicles.

03

Experience cycling on the spot

Feel whether the vehicle starts, accelerates and runs smoothly, whether the vehicle is comfortable to handle, and check the brake tightness, handlebar flexibility and wheel mobility to ensure that the selected vehicle is suitable for its own handling; Do not modify or ask the seller to modify the electric bicycle without authorization, so as not to bury hidden dangers for future driving safety.

04

Retained consumption voucher

Keep the proof of purchase, such as invoices, shopping receipts, detailed list of goods, etc. If quality problems of goods are found during use, complain about rights protection in time.

　　Author: Zhang Sheng

　　Source: mingjin. com (ID: mingjin-wang)

　　(This article first: Mingjin. com, image source: network)

　　The epidemic situation is the "touchstone", testing the immunity of individuals and enterprises.

　　Also accepting the big exam is Chinese medicine!

　　one

　　This is a topic that is hidden behind COVID-19’s treatment, but runs through it all the time, that is, Chinese medicine or western medicine, which can save lives better, although it has not been put on the table by experts and medical staff, but the infighting has never stopped.

　　On February 17th, at the press conference of joint prevention and control in the State Council, Jiang Jian, director of the Department of Medical Administration of state administration of traditional chinese medicine, released the latest data: there were 60,107 confirmed cases in which Chinese medicine participated in the treatment, accounting for 85.2%. Outside Hubei, 87% of the confirmed cases were cured, discharged and their symptoms improved.

　　According to the Hubei Health and Health Commission, as of 24: 00 on February 16th, 58,182 patients were diagnosed in 225 designated hospitals in Hubei, and the utilization rate of traditional Chinese medicine was 83.3% (80% in Wuhan). Among them, 4978 confirmed cases were treated in 42 designated Chinese medicine hospitals, and the utilization rate of Chinese medicine was 96.4%. At present, 11 shelter hospitals simultaneously distribute Chinese medicine decoction and 5 kinds of Chinese patent medicines.

　　Even so, we haven’t heard much praise for Chinese medicine except that there are fewer voices denouncing "Chinese medicine cheating".

　　What public opinion can see is the crazy scene after every western medicine is "on the platform" by some scientific research experts and institutions, from people snapping up in pharmacies, to medical institutions in various provinces sending letters to purchase, and then to the stock market arrogance, behind which vested interests earn a lot of money.

　　However, few people noticed that only chloroquine phosphate and Abidor were added to the latest version of the diagnosis and treatment plan, and there were four kinds of western medicines, including lopinavir and ribavirin, all of which were used for antiviral treatment. The "effective" efficacy expected by countless people did not turn into "specific". The statement that "no effective antiviral treatment has been confirmed at present" has been deleted, which may be the biggest breakthrough of western medicine in six versions.

　　On the other hand, the diagnosis and treatment of Covid-19 by Chinese medicine was classified from the third edition.

　　After falling into the category of "diseases of traditional Chinese medicine" and providing treatment methods for four different symptoms, the latest version of the plan clearly states that Chinese medicine has been involved in the whole course of treatment, and divided into two stages: medical observation period and clinical treatment period, and the clinical treatment period is specifically divided into light, ordinary, severe, critical and recovery period. Each stage and each type have detailed clinical manifestations, corresponding specific prescriptions and taking methods.

　　Undoubtedly, Chinese medicine has made great contributions to the prevention and control of the Covid-19 epidemic.

　　"It’s better to put medicine on the shelf and hope that people in the world are innocent". One by one, the patients who have been diagnosed recover and are discharged from hospital, and they no longer need doctors and medicines. This is what the majority of Chinese medicine practitioners and people who support Chinese medicine most want to see "praise".

　　two

　　Academician Zhong Nanshan is the one who should be most grateful to Chinese medicine for making great efforts and not being wronged any more. He was the first person to call on Chinese medicine to fight against Covid-19.

　　On January 29, 2020, Academician Zhong Nanshan made it clear in an interview: "Chinese medicine should intervene at the beginning, and don’t look for Chinese medicine until it fails at the end."

　　At the press conference on February 18th, Zhong Nanshan reported the latest progress of Covid-19’s medicine, and once again renamed TCM. He pointed out: "There are quite a few western medicines that are effective in vitro, but not in the human body. However, Chinese medicine is not the same, and some drugs are already very commonly used in clinic. "

　　

　　In fact, at the beginning of the epidemic, Chinese medicine treatment has been widely involved in other parts of Hubei, but in Wuhan, where the epidemic is the most serious, Chinese medicine has been delayed or even excluded. Chinese medicine has no right to diagnosis and treatment, but it can’t get medicine when it is prescribed.

　　At the critical moment, Zhong Nanshan, together with other academicians, strongly appealed that Chinese medicine could be gradually involved in epidemic prevention and control in Wuhan with the support of the state.

　　With the experience and lessons of the first-line fight against SARS 17 years ago, Zhong Nanshan’s judgment is very accurate. When the analysis result of the similarity between Covid-19 and SARS sequences is as high as 80%, his judgment is strengthened.

　　At that time, Chinese medicine intervened in the treatment of SARS by chance, and Chinese medicine doctors formulated three kinds of decoction:

　　During the fever period, the No.1 prescription was used to clear lung and detoxify, cool blood and promote qi, and penetrate evil.

　　In the period of wheezing, the second prescription of clearing heat and relieving asthma, penetrating nutrition and detoxifying, and publicizing the turbid epidemic was used;

　　In the recovery period, the No.3 prescription was used to clear the residual poison, replenish qi and yin, and tonify the lung and spleen.

　　This is the famous SARS formula 1, 2 and 3.

　　For the diagnosis and treatment of Covid-19, Wuhan tongji hospital has developed the corresponding No.3 prescription:

　　COVID-19 No.1 Prescription (no fever in advanced stage): regulating qi, resolving phlegm, eliminating dampness and cooling blood, which is mainly suitable for critically ill patients with no fever and progressive lung inflammation.

　　COVID-19 No.2 Prescription (progressive fever prescription): clearing away heat and resolving phlegm, drying dampness and cooling blood, which is mainly suitable for critically ill patients with persistent high fever and progressive lung inflammation.

　　COVID-19’s No.3 prescription (recovery prescription): invigorating the spleen and benefiting qi, eliminating dampness and promoting blood circulation, which is mainly suitable for patients with fatigue and shortness of breath in recovery period.

　　At present, the prescription has been promoted to the whole country.

　　In fact, both SARS and Covid-19 belong to "cold-dampness" diseases in Chinese medicine. The concept of Chinese medicine treatment is to leave the virus in the body alone, but to make people’s cold and damp gas no longer exist, enhance people’s ability to fight viruses, make SARS virus have no living space after entering the human body, and realize the "self-healing" of the human body while putting an end to infection.

　　This is the most frequently mentioned term since the epidemic: immunity. In the absence of specific drugs, those who are discharged from hospital after treatment rely on enhancing their immunity, thus defeating the virus.

　　It was only during the SARS period that TCM intervened late. At that time, many TCM experts and scholars jointly wrote to the Central Committee, and then TCM was able to enter the battlefield in Beijing, and achieved a miracle of "over 98% cure rate and no infection among medical staff" in Xiaotangshan Hospital, and the cured patients basically had no sequelae.

　　If Chinese medicine could participate in the treatment earlier, there would not be such a large mortality rate of SARS, and there would not be many people who suffered from sequelae due to the large use of hormone drugs.

　　It is worth mentioning that as early as during the SARS epidemic, Professor Deng Tietao, a master of traditional Chinese medicine, made a bold prediction that "SARS will go on its own".

　　This is indeed the case. Professor Deng Tietao pointed out in an interview: Because the human body’s heat and cold qi rose in May and June, the cold and wet qi disappeared, and the epidemic disease could not be carried on.

　　three

　　Calligraphy, Peking Opera, Martial Arts and Chinese Medicine are also called the four quintessences of China.

　　The terrible reality is that we are already surrounded by western medicine, which has become the backbone of the medical field in China. The idea of "three elements and one soup" has been instilled in hundreds of millions of people, which has also led to the distance between Chinese medicine and ordinary people.

　　Most people are sick, but they have a cold and fever. Whether they go to pharmacies, clinics or hospitals, they are all given antibiotics, hormones and vitamins. It is really impossible to add some glucose injection.

　　Traditional Chinese medicine focuses on conditioning. In most cases, this kind of minor illness and pain does not need to take medicine. It can heal itself in a week or so without any sequelae.

　　However, if doctors treat their patients like this and go home with a cold to drink more water and have a good rest, then the hospital will have to drink northwest wind.

　　What is even more frightening is that Japan, South Korea, the United States, Germany and other countries with the most developed medicine in the world are keen on studying Chinese medicine, and hundreds of foreign pharmaceutical companies and research institutions are looking for and developing new drugs from Chinese medicine; Among foreign students studying in China, the number of people studying Chinese medicine ranks first; According to the statistics of World Patent Database, among the patents of Chinese herbal medicines and botanical medicines in the world, the number of patent applications for traditional Chinese medicines accounts for 44.4%, but only 0.3% belongs to China.

　　Yes, Chinese medicine has been paid attention to all over the world, but everything seems to have nothing to do with China. Many experts and scholars are still busy arguing about "which is the more authentic Chinese medicine and western medicine", and some buffoons have jumped out to discredit Chinese medicine everywhere, which has to be said to be a national sorrow.

　　Outside of China, Japan is the largest producer and consumer of traditional Chinese medicine. Their Chinese prescriptions absorb all the essence of traditional Chinese medicine. According to the ancient prescription of Zhang Zhongjing’s Treatise on Febrile Diseases, 210 patents have been owned by Japan. While our hospitals are still worried that Chinese medicine will not make money and students refuse to learn Chinese medicine, Japan has won 90% of the world’s Chinese medicine market, while our own is only 3%.

　　What is even sadder is that 75% of the raw materials for the production of traditional Chinese medicine in Japan are imported from China, and in turn, the drugs produced are sold to us at the price of 10 times or even dozens of times. Every year, our compatriots sell them in Japan, and most people don’t know that those drugs are available in China.

　　The following video made all Chinese people think deeply. Japanese dare to shout out the slogan "Now we will learn Chinese medicine from China and let China learn from us in ten years", but we seem to have no choice.

　　

　　four

　　Many people always like to talk about the science and pharmacology of traditional Chinese medicine. I quite agree with Academician Han Qide of Chinese Academy of Sciences.

　　He said: Chinese medicine is good, not necessarily scientific. But science does not lie in being correct. Without science, it can be said that it is incorrect.

　　We should know that the theory of traditional Chinese medicine was formed in the Spring and Autumn Period and the Warring States Period more than 2,000 years ago, and science was only a system recognized by some people on earth after the development of human civilization in 1500 AD.

　　To put it simply, Chinese medicine makes you confused and alive, and you can’t understand and clearly explain the therapeutic process of drug efficacy in the body, so it is wrong. Is this logic right?

　　We don’t deny that Chinese medicine, like western medicine, has many defects, but there is no perfect treatment for any disease in the world, but this does not hinder the greatness of Chinese medicine.

　　Tu Youyou, a "three noes" scientist in China, invented artemisinin, which won the Nobel Prize in medicine, and helped mankind conquer malaria. She was inspired by the classics of traditional Chinese medicine and won the highest honor of traditional Chinese medicine for China in the world.

　　As a Chinese, we don’t want to see the traditional Chinese medicine left by our ancestors as a treasure in other countries, but not cherished by ourselves. I hope it can inspire more people and prevent our future generations from going abroad when they want to see traditional Chinese medicine.

　　There is no contradiction between traditional Chinese medicine (TCM) and western medicine (WM).

　　Finally, I would like to share a cartoon with you, which vividly depicts the difference between Chinese medicine and western medicine in treating diseases and epidemics.

This article first appeared on WeChat WeChat official account: Mingjin. com. The content of the article belongs to the author’s personal opinion and does not represent Hexun.com’s position. Investors should operate accordingly, at their own risk.

The Fifth Session of the 12th Chinese People’s Political Consultative Conference will hold its second plenary meeting in the Great Hall of the People at 3pm on March 9th. Many CPPCC members will give speeches on relevant topics. The meeting will be broadcast live on the website of the Chinese People’s Political Consultative Conference and related news websites. Please watch.

　

　

Live video address: www.cppcc.gov.cn/zhibo1.html

　

　

　

　

China Political Consultative Conference Network

March 9, 2017

Original sesame and HELEN peanut net

Once I was chatting with my daughter’s classmate’s mother, and she said that she was envious of my family’s good grades in every subject. I said it was a big misunderstanding. So she asked me to tell her which subject was not good. I said: Math. Then she smiled and said I was being sarcastic.

I laughed, too. Think about my daughter’s perfect score in math or the first in her class every time she entered the fourth grade. I also said that she was not good at math, so would she have no friends if she chattered like this? But I think I’m telling the truth, because in all subjects, my daughter shows the least interest and conscious investment in mathematics. Judging from her childhood, her interest in mathematics is not much. But this doesn’t mean that we can’t learn math well, nor does it mean that we won’t have a strong interest in math in the future.

So, today I want to record my thoughts on children’s math learning and cheer up the children who have little interest in math like us. Then, how to learn math well if you are not interested enough?

This article was published by Huayou @ Sesame and HELEN in Little Peanut Writing Plan.

First, I will share my three key points about the cultivation of my daughter’s mathematics learning ability:

Cultivation logic

Understand the concept

Looking for patterns

Cultivation logic

Logic is the basis of learning everything, and logical thinking is very important for children’s growth. Mathematics is inseparable from logic, and the formation of a person’s logical thinking develops with rationality and needs to be cultivated from an early age.

1. Borrow picture books and mystery novels to cultivate logic

During my daughter’s kindergarten, I also moved all kinds of math picture books home, but what she could accept was very limited, and she often encountered the situation of throwing them out and not reading them.

What’s more, the three-year-old brother gave her his favorite logic dog, and the two-and-a-half-year-old daughter turned to leave after playing, which was a far cry from his obsession. What should we do? We use other picture books to make up for it. In fact, in addition to math picture books, there are many picture books with strong logic, and many picture books contain math knowledge and concepts. But they are more story-telling and literary than math picture books, and they are more suitable for children who are good at liberal arts.

Here are a few simple examples.

Speaking of picture books with strong stories and good logic, I recommend Gagurizi’s books. For example, the series "Crow Bakery" is all about solving problems, among which there are better mathematical thinking.

The following book is about the development history of the house, and thinking is a line running through it.

In addition, picture books with mathematical concepts, 365 Penguins, 12 Big Troubles of Rabbits and so on are also very good.

There are also Korean and Japanese mathematics enlightenment books, and Li Yupei’s mathematics enlightenment stories, which are also very story-telling.

In primary school, my daughter likes Sherlock Holmes, and this kind of mystery novel can also exercise children’s logical thinking.

Similarly, Keigo Higashino’s books will do.

2. Daily communication and exercise logic

Daily communication with children should also pay attention to whether the dialogue is logical and should be expressed clearly and concisely. Only in this way can children be trained to form an efficient and simple way of thinking.

In addition, having a debate at home or having a discussion on current events will exercise children’s logical thinking.

There is also a family reading sharing meeting that we enjoy. Every time, children need to clear their minds, introduce us to the content of a book, the reasons for recommendation, their own understanding of the book, etc., and also ask questions according to our sharing content. These processes are also a challenge to her logical thinking.

3. Exercise logical thinking through games

Letting children invent games by themselves is a good way to exercise logical thinking. Setting the rules of the game must form a logical closed loop, which needs to be rigorous and interesting. Playing games can also exercise logical thinking, and most educational toys are actually based on the promotion of logical thinking.

Understand the concept

I think learning mathematics in primary school should aim at laying a foundation. How to lay this foundation, I think the key is to have a process of thinking and understanding the concept. In the pre-school stage, we didn’t teach our children to calculate, but took her to know and be familiar with numbers from various angles. In preschool and the first grade of primary school, my daughter was fascinated by han sheng mathematics. I think this set of books is very helpful for understanding mathematical concepts.

Reading every book, we need to find the material, and discuss it while doing it. To tell the truth, it takes a lot of effort, but it is also very rewarding. During that time, the child shared a lot of her understanding of mathematics with us.

Looking for patterns

In daily chat, we will discuss and discover mathematical laws together. For example, on a way home, the daughter who just learned addition figured out the multiplication table herself, which made her very happy. After knowing integer operation, she advanced to decimal operation, positive and negative operation. In the process of finding the law, we have once again verified the importance of understanding the concept.

With the passage of time, my daughter has taken a little interest in mathematics. I think it is not difficult to learn mathematics well by doing the above three points (logic, concept and law).

Further share our experiences in the lower grades of primary school.

Six mathematical enlightenment practices

My enlightenment to children’s mathematics has always been in an unconscious state. But mathematics in life is really everywhere, and the so-called enlightenment has been completed unconsciously. The following are some enlightenment experiences in the lower grades of primary school, which may bring you some reference.

1. Counting and recognizing numbers: My daughter gave me great surprises when she counted in front of me for the first time and recognized Arabic numerals for the first time. Because our whole family didn’t realize that we had to enlighten our children at that time. But the child unconsciously learned it by himself. Why? Because we usually use these numbers. For a daughter, watching how adults use numbers may be as natural a learning process as using chopsticks. Integrating numbers into the language and letting children feel the meaning of numbers may be regarded as our initial mathematics enlightenment for children.

2. Know the score, percentage, decimal, positive and negative numbers: The daughter knows the score and percentage when cutting her nails. When children were young, they were impatient with nail cutting, so I used questions to distract her. How many have you cut now? How many are left? How many parts have you finished cutting? What’s the percentage difference? Unexpectedly, as long as you ask questions step by step, your daughter can answer them.

Going up the stairs and looking at the thermometer are good opportunities to know positive and negative numbers. During kindergarten, my daughter understood the concept of negative numbers and saw how to use positive and negative numbers to express different directions and deal with more complicated problems. Later, naturally, I understood the meaning of absolute value.

Go to the market to buy food, and naturally use decimals. In the first grade, I went to the market to buy food, and my daughter settled the accounts herself, which was very good. Buy more than a dozen dishes, yuan jiao fen can also be calculated clearly. In order to facilitate the calculation, she used decimals.

3. Deepen the perception of numbers in chatting: I am very willing to chat with children and talk about everything. We will talk about our favorite numbers and think which one is particularly different. Children’s understanding of numbers can also be seen from these chats. Including mathematical concepts such as approximate number, infinity and limit, we have all brought them in in small talk.

Here’s a girl’s opinion about numbers:

What is "zero"?

She said: Zero is the origin of the universe. You can find a number anywhere, and you can find a number corresponding to it through zero. Zero not only means nothing, but also has many other meanings. For example, zero can mean the horizon.

A useless number.

My daughter thinks that some numbers are useless, such as very, very large numbers, which are so big that few people can use them. Moreover, when the number you want to count is that big, you don’t care what it is. Others are because it has been changing, so it is meaningless to count the specific figures. For example, how many bacteria are there in the world, or how many bacteria are there in a person. It’s changing all the time, and it’s fast. If you want to say exactly how much it is, you have to talk about units much smaller than seconds.

4. Different solutions to a problem: I don’t pay much attention to where the child’s math class has gone, and whether she has done the problem correctly. I am more concerned about what kind of problem-solving ideas she has when she encounters problems. From simple addition and subtraction to complex application problems, I will discuss with her how many solutions there are. Now the same is true for her classmates. If the first method is not understood, she will use the second and third methods to answer it.

5. Break through a little bit every time: I like to let my children try what the teacher hasn’t taught. If you know the addition and subtraction within 20, you will figure out what is within 100 and what is within 1000. If you know addition, let the children ponder multiplication by themselves. Knowing how to multiply single digits, I figured out how to multiply two digits by one digit and two digits by two digits. Give children a chance to explore for themselves.

6. Develop thinking in the game: We don’t brush the questions, but we brush the games. Sudoku, board games and poker, these three items are all related to mathematics. Especially board games, there are very rich resources now. It is very helpful to train children’s concentration and memory, sense of space, logical thinking and problem-solving ability.

Share our mathematics enlightenment book list simultaneously

Like me, she hasn’t read so many math books. When I was a child, I liked a set of math games in Itsumi Taro, and later I was in han sheng. Now I just started studying terrible science.

In a word, I don’t care much about my children’s mathematics. I haven’t read any books about the enlightenment of mathematics, nor have I taken my children to study and practice systematically. I just learn what I encounter in my life, and I hope I can find more wonderful things on the way in the future.

digression

A few days ago, I posted a post in the hope that the flower friends would contribute to the daily performance of Niu Wa in Mathematics. Now I will share my statistical results with you.

Love to do problems: 14 votes (of which 4 votes mean love to challenge difficult problems)

Strong logical thinking ability: 7 votes

Like to deduce formulas and theorems, and sum up laws: 7 votes.

Like to sort out the relationship between knowledge points and master the links between old and new knowledge: 3 votes.

Like self-study (learning in advance): 2 votes

The other 1-vote items are: understanding ability, like reading math books, like playing math games.

Flower friends have discerning eyes, and all these projects are helpful for math learning. If we find that children also have such ability, or occasionally make such performance, we will encourage them. The above views are for your reference only. On the way of learning mathematics, I look forward to your company and getting better and better.

Original title: "Daughters who have no interest in mathematics since childhood, almost all the exams after the fourth grade are full marks, methods and books …"

Read the original text

　　The writer of this article is @ A Dai of Xiaowan family.

　　The ugly idolize dog is here.

　　Remember the "Do Min Joon" from the stars seven years ago?

　　He’s back with his ABS!

　　Therefore, the new drama was reported as "too large", Xiaowan:? ? ?

　　Speaking of it, as a rare "three-good student" with good acting skills and high popularity, the degree to which Kim Soo Hyun cherishes feathers is staggering.

　　After "You from the Stars" spread all over Asia, the only works he starred in in six years wereA play "The Producer"andA movie "Real".

　　After retiring from the army in July 2019, he was also cautious in the choice of comeback works, and finally took over this "Although it is mental illness, it doesn’t matter" from the beginning of the title of the play.

　　The new drama started on June 20th. After finishing six episodes, Xiaowan couldn’t help but sigh: This brother is so good at choosing scripts!

　　It doesn’t matter though it’s mental illness.

　　The play is produced by Netflix and TvN, and directed by Shin-woo Park who has worked with Cho Jung Seok (Jealousy Avatar) and Park Bo Gum (Boyfriend).

　　But unlike such sweet romantic dramas as Jealousy Avatar and Boyfriend, It doesn’t matter though it’s mental illness.Dark fairy tale love drama.

　　The leading actor, Wen Gangtai (Kim Soo Hyun), is a psychiatric nurse practitioner who has been dealing with various mental patients for ten years.

　　And this is not his biggest burden: Wen Gang’s parents died when he was too young, and he lived alone with his autistic brother.Taking care of his brother is his "reason to live".

　　Gentle and restrained, coupled with rough life experience, the "angel-like" Wengangtai always gains the pity and care of the people around him, and his life can be regarded as bitter but warm.

　　The heroine, Gao Wenying (Seo Yea Ji), is completely the opposite of Mrs. Wen Gang: she is a popular fairy tale writer, rich and popular, and everywhere she goes, she is full of stars.

　　But because of suffering fromAntisocial personality disorderCoupled with the shadow left by his father’s violence and his mother’s suicide when he was a child, Gao Wenying developed a defiant, arrogant and reckless style.A "witch" who pursues extreme egoism to the end.

　　Angels and witches meet unexpectedly, so it’s meant to be, right?

　　No, it doesn’t matter if it’s mental illness.Two disabled people heal each other.The story.

　　Pay attention to personality defect groupsThe setting of+the highly anticipated Cass, this drama was not unexpectedly one of the ratings in the same period on the opening day.

　　On the day of the premiere, the female host’s exquisite makeup and high-cold gas field were eye-catching, and the male host also brushed a wave of heat through the abdominal muscles.

　　However, with the deepening of the plot, the characters of Wen Gang Tai and Gao Wenying and the long story formed by this character have become a greater motivation for the audience to follow the drama.

　　Gao Wenying’s "abnormality" can be seen at a glance.Anti-social personality disorder makes her unable to communicate with people normally, arrogant and rude, and her language is vulgar.

　　At the beginning of the series, she directly explained her experience with a Gothic animation: she was imprisoned as a monster since she was a child, with no friends and no freedom.

　　And her fairy tales are alsoDark fairy tale style with cruel words and bloody illustrationsAlthough it is very popular, it is often on the verge of "no sale".

　　After getting to know Mrs. Wen Gang, a nurse, Mrs. Wen Gang will often comfort her emotions and help her calm down in a professional way when she is rude and violent.

　　Because of the relationship between the patient and nurse practitioner, the audience will initially think that the "mental illness" in the title refers to the heroine Gao Wenying.

　　But as a "patient", Gao Wenying has her own way of relieving:Every work of hers tells her own story.

　　Speaking of the dark past and accepting it, Gao Wenying has taken the first step of "healing".

　　In addition to the autistic brother who is receiving treatment and the anti-social personality woman who is self-resolving, Kim Soo Hyun playsWengangtai is the "patient" who hides the deepest.

　　Because my brother is autistic, Mrs. Wen Gang was asked to take care of and protect her brother from an early age.

　　Mother will even look Wen Gangtai directly in the eyes and tell him:I wanted someone to take care of my brother, so I gave birth to you.

　　Wen Gang, who was born because he was useful, was taught to live for his brother since he was a child, and only his brother’s mother let him.Accustomed to suppressing one’s emotions and desires..

　　For more than ten years, I have been circling around my brother, which has made him a typical paying and even flattering personality.

　　After his mother died unexpectedly, Mrs. Wen Gangtai was left with her brother, who could not perceive emotions. He tried to teach him to judge others’ emotions through expressions: what is happiness, what is anger, what is disappointment …

　　Because my brother learned to read and read, over time, Mrs. Wengang would habitually smile as long as she faced her brother. He said, "It’s not hard to smile at people anyway.”。

　　Having lived with my brother for a long time, and having a professional nurse practitioner qualification certificate, such Wen Gang seems to be very good at dealing with people with mental/mental state deficiency.

　　But in fact, from childhood, he failed to learn to talk to himself and how to express himself correctly.

　　Wen Gangtai is also a "patient". He doesn’t know how to love himself.

　　As his friend Jae-soo said: You laugh like a clown.

　　One sentence tells the real life and psychological state of Wengang.

　　On the surface, one of them is an angel and the other is a witch.

　　In the previous episodes, the painting styles of Wen Gang Tai and Gao Wenying in the play are also two extremes:

　　The man lives in poverty and his brother is ill, but the company of his brother and friends fills his side with a dull and warm atmosphere;

　　The scene in which the heroine appeared alone turned into a horror suspense film in seconds, with arrogance during the day and nightmares at night, which was completely miserable.

　　But just like BGM’s lyrics, "You breathe in my body and pour out your thoughts; I lost everything and breathed in your shadow. "

　　The spiritual world of Wen Gang Tai and Gao Wenying is actually two sides of the same coin set in "Although it is mental illness, it doesn’t matter".

　　They represent the two extremes of human inner feelings, and they are all eager for the other side of themselves, so they will attract each other and get closer and closer.

　　So this drama is actually aboutAngels and witches attract each other, heal each other, and finally become human beings.The process.

　　This process is actually quite cruel.It is extremely difficult to admit that you are missing and need to be cured.That’s why society is afraid to avoid "mental hospitals" and "mental patients".

　　Therefore, the whole drama "It doesn’t matter although it’s mental illness" is trying toCreate a "divorced from reality" atmosphere.

　　The world in the eyes of autistic brothers is a world that will interact with themselves like cartoons.The model in the window will wave, the clouds on the mural will glow, and everything in the world will change rapidly with his mood;

　　The lights in the mental hospital are always flickering, and the patients’ various auditory hallucinations are shaped into a horror film atmosphere;

　　Gao Wenying’s castle is like a fairy tale with dark style. The witch and princess live in the world at the end of the forest …

　　This aspect is presenting what we often say.Psychopaths’ own world",give the audience a direct impact.

　　On the other hand, these seemingly incompatible environments are actually revealing the final direction of the play:

　　All this is true. There are always people who live like this.

　　As for how to peel off the layers of fog and disguise to see the truth, "Although it’s mental illness, it doesn’t matter" also gives the answer:

　　There are a lot of close-ups of faces and even partial close-ups of eyes in this play.

　　Do you still remember Mrs. Wen Gangtai’s training for autistic brothers? Expression can judge people’s mood.

　　Even if the expression can be disguised, the true inner emotions will be revealed through the eyes.

　　Note: Some pictures in this article are from Douban and the Internet. If there is any infringement, please contact us actively.

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　　[A Dai’s previous articles]

　　Click to read

　　At present, you need to know Chinese Doctors.

　　Where will the domestic drama go after the release of Hidden Corner?

　　It’s not stepping on it, you have to thank it for crossing the film

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　　HPV (human papillomavirus vaccine) vaccine reservation market "yellow cattle" is active. Recently, Qing Liu (pseudonym), a citizen of Guangzhou, also saw relevant news in the circle of friends, "There are still a few 9-valent HPV vaccine appointments this week. Inoculation community: XX Community Hospital, Panyu District; Vaccine: 1331/ needle ×3 needles, paid at the community hospital, with an appointment service fee of 3,000 yuan, and paid at Noah’s clinic. "

　　In fact, there is no need to pay extra fees for booking vaccination through the official platform. However, due to the long-term shortage of nine-valent HPV vaccine, it is often "second light" after the number is released, and the huge market has also spawned a large number of "vaccine scalpers".

　　Recently, the reporter of national business daily called the Noah Medical Public Telephone Consultation mentioned above as a consumer. The other party said that the supply of 9-valent HPV vaccine in Guangzhou is tight at present, and only Panyu District has seedlings for the time being, but individuals can’t go to community hospitals. The secret lies in the "service fee". "If we make an appointment here, the community will also charge a certain fee, which is included in the reservation price of 3,000 yuan."

　　The reporter also noticed that the "vaccine scalpers" who provide the booking service are rampant on different social platforms. How can they use invisible hands to make profits in the state of "no seedlings" in community medical institutions? How does this gray interest chain around the nine-valent HPV vaccine move the rights and interests of the general public? Who should be responsible for the repeated violations of scalpers?

　　Some private hospitals call it "channel fee", which can be inoculated in community hospitals.

　　Qing Liu hasn’t grabbed the 9-valent HPV vaccine, but she is dubious about the "scalpers" in her circle of friends. According to the picture information sent by the intermediary in the circle of friends, Noah Medical can provide the "Zhenai Women’s Health Management Package" with 2 outpatient visits by gynecologists, 1 ultrasound examination and 1 tooth cleaning maintenance, and give an additional HPV9-valent vaccine (three needles) to make an appointment.

　　On February 23rd, the reporter of national business daily called the contact number on Noah’s medical publicity picture as a consumer, and the other party clearly stated that the supply of 9-valent HPV vaccine in Guangzhou is tight at present, and only Panyu District has seedlings for the time being. Noah’s medical can make an appointment in the community hospital on behalf of the consumer, and the corresponding appointment fee is 3,000 yuan, including three items with a total price of 2,000 yuan. If the appointment is successful, the consumer needs to pay the vaccine fee of 1,331 yuan/needle to the community hospital separately, and the total cost of 3 needles is 3,993 yuan.

　　In the introduction of employees, this service has no "gift" nature — — "In the past, the service fee for our 9-valent HPV vaccine was 3,000 yuan, but some customers felt that the price was more expensive before adjusting it to give away the rest of the items."

　　As if afraid that the reporter didn’t understand, the employee said again, "That is, we will help you to get vaccinated in a community hospital, and you have to pay the (vaccine) fee to the community hospital." When the reporter further asked which community he could go to for vaccination, the other party’s answer was vague, only revealing that one of the community health service centers had a relatively large supply.

　　However, when the reporter inquired about Guangdong official vaccine platform "Yuemiao" and WeChat official account, a community health service center in Panyu District, Guangzhou, he found that it was impossible to make an appointment. After the reporter called, he was told that the application qualification is free and the injection will be charged.

　　Since the community is "seedless", how do private hospitals make appointments? The aforementioned Noah medical staff said that there are very few nine-valent HPV vaccines now, and too many people make appointments. "I can’t make an appointment in a community hospital. If we make an appointment here, the community will have to charge a certain fee, which is included in the appointment price of 3,000 yuan."

　　When the reporter showed that the price was too high, the person said that if you want to enjoy the 9-priced HPV vaccine reservation service at a cheaper price, you can choose another package with a price of 2,500 yuan. The difference from the 3,000-yuan package lies in the different inspection items, but it is still very cost-effective compared with other options in the market.

　　What is the "channel fee" and whose pocket does it fall into? The person did not give a more detailed explanation, only reminded reporters, "Now you go to many institutions outside to make an appointment, and they say that you can get 3 shots, but you can’t guarantee that all 3 shots will be made on time, but we can guarantee it." It also asked reporters when they want to vaccinate, and they can choose the vaccination time relatively freely.

　　On the afternoon of February 24th, national business daily tried to interview Noah Medical, but as of press time, he didn’t get a reply.

　　On February 25th, the reporter called Noah’s medical consultation telephone again as a consumer, and the wiring staff also said that the reason why Noah could help make an appointment for customers was "to operate through institutional channels" and "to cooperate with community hospitals". "If some customers don’t want to pay the appointment fee, they can only queue up slowly by themselves, and there is no such priority (vaccination) service".

　　Alternative "intermediary": bundling medical examination packages

　　In addition to the "intermediary" like Noah Medical, some private medical institutions regard HPV vaccine as a "cash cow" for drainage.

　　In public medical institutions, the price of 9-valent HPV vaccine is 1,318 yuan/piece, and a total of 3,954 yuan is required for three doses. However, in many private hospitals, the vaccination of 9-valent HPV vaccine requires a medical examination package, and the total cost needs 5,000-6,000 yuan.

　　At the beginning of February, the chaos of bundling the "medical examination package" when private hospitals inoculated with the nine-valent HPV vaccine appeared on the hot search. On February 6th, the reporter of national business daily called Beijing Jiahe Women and Children Hospital (hereinafter referred to as "Jiahe Women and Children") for consultation as a consumer, and obtained the link of the nine-valent HPV vaccine medical examination package sent by employees.

　　At that time, the package price was 5680 yuan, of which only two were clearly marked, namely the price of 9-valent HPV vaccine was 3894 yuan (3 needles), and the vaccination fee was 75 yuan; The rest of the price comes from blood routine, urine routine, four items of kidney function, five items of blood lipid, eight items of liver function and four items of virus, and the service fee of gynecologists.

　　On February 6 th, Jiahe women and children 9-valent HPV vaccine physical examination package Image source: Jiahe women and children employees

　　When the reporter asked if the 9-price HPV vaccination service could be purchased separately, Jiahe women and children employees said that "the cost of three shots of vaccination alone (vaccine+vaccination fee+service fee) is 5469 yuan", which is not much different from the price of the bundled medical examination package.

　　On the same day, the reporter also randomly called Beijing Mingde Hospital, Beijing Wuzhou Women and Children Hospital and many other private hospitals that provided 9-priced HPV vaccination services on public comments, and found that these private hospitals can be roughly divided into two categories, one is represented by Jiahe women and children, and the package provided includes a number of medical examination items, and some said that "(other items) can be abandoned, but no refund can be made"; The other category, represented by Beijing Mingde Hospital, clearly indicates that the package price only includes the cost of 9-valent HPV vaccine, vaccination and service fees, and does not include other testing services.

　　In addition, some hospitals are similar to Noah Medical, and the package fee includes the appointment fee. The difference is that they also provide vaccination directly.

　　On February 23rd, the reporter of national business daily clicked on the package link of Jiahe women and children again. The original package content was replaced by the cost of 3 shots of vaccine, vaccination fee and doctor service fee. The total package price was 5369 yuan, but the items were not clearly marked.

　　The reporter’s search for "9-valent HPV vaccine" in the public comment also found that no longer merchants package and sell 9-valent HPV vaccine with other physical examination items, but the price of 3-needle vaccination is still between 5,000 yuan and 6,000 yuan, which is 50% more expensive than that of public hospitals.

　　Cracking the "yellow cattle" needs to start from two aspects: open source and supervision.

　　The contradiction between supply and demand of HPV vaccine has a long history. The data shows that the 9-valent HPV vaccine supplied by Merck to China is increasing every year. According to the semi-annual report of Zhifei Bio in 2022, in the first six months of last year, the number of 9-valent HPV vaccines issued by Merck was 9,298,700, a year-on-year increase of 379.34%.

　　However, according to the age range from 9 to 45, the number of women with HPV vaccine in China may exceed 300 million, and the gap between the vaccine that can be put on the market and the vaccination demand is very wide, and the number of people who can be vaccinated is less than 1% of the total. In addition, the production process of 9-valent HPV vaccine is complicated, and the production cycle takes four years, so it is difficult to keep up with the huge demand in China in a short time.

　　Earlier, some media reported that some citizens in Shanghai made an appointment for a 9-valent HPV vaccine and were told to wait for 3 to 5 years.

　　"It is a situation where there are not enough porridge, and there are less than 10 million in total. Some communities may have 10 branches and 8 branches a month, but the reservation platform is for the whole province, even if there is no ‘ Cattle ’ It is also a second light. " An industry insider familiar with the vaccine distribution mechanism told national business daily that the high demand for 9-valent HPV vaccine is just like the train ticket in Spring Festival travel rush, mainly due to the imbalance between supply and demand. As for why private hospitals seem to have more stocks, it is mainly because the price is expensive and there are relatively few people to vaccinate.

　　Because of this, some school-age women will choose high-priced services. According to the data of the first hour of the pre-sale of Tmall double 11 in 2022, the pre-sale amount of HPV vaccine reservation increased by over 600% year-on-year.

　　It is also the huge demand of young women for nine-valent vaccine that provides huge profit space for cattle. This situation has been reported in recent years, but why is it repeatedly banned? Where did the scalper exploit the loophole?

　　"Now I use the ID card to make an appointment with the APP, and the data is in the CDC. It is estimated that it is to prevent related households and scalpers." A doctor from a basic medical institution told the reporter of national business daily that the supply and demand of nine-valent vaccine in his area are relatively balanced, and all the people who want to fight can basically grab the number. The "yellow cattle" still exist in some places where vaccines are difficult to grab. The "channel fee" is basically the same as that of a 3-needle vaccine. The "scalper" is profitable and definitely willing to take risks. Some people don’t want to wait, but they are definitely willing to pay a high price to "go through the back door".

　　The doctor of another county-level hospital told reporters that the supply of 9-valent or even 4-valent vaccines in his area is in short supply. The hospital has received an appointment system before, but it has not been publicly launched because of the small number of vaccines. At present, it still continues the tradition of paper registration. The appointment only needs to leave the name and phone number. After the CDC issues the vaccine, the hospital will call the appointment person in the order of appointment to inform them to come to the hospital for vaccination.

　　It is not difficult to find that online data of this paper appointment and vaccination results are difficult to get through. Even if there is no appointment, as long as accurate identity information is input when vaccination, the vaccination information will also be synchronized to the vaccine platform developed by the Health and Health Commission, leaving more room for "yellow cattle".

　　The doctor also said that he had heard that some people were doing this business in big cities, but no one had done it in the county, "because there are too few seedlings."

　　The reporter of national business daily learned that many regions are exploring a more scientific, fair and open vaccine distribution mechanism. At present, most regions make an appointment to vaccinate HPV vaccine through APP, but users can only see whether each region has a number, and if they don’t grab the number, they have to wait for the next round. They don’t know how many vaccines can be grabbed or how many people are grabbing it.

　　At the "two sessions" in Shanghai in 2022, Chen Songju, a representative of the Municipal People’s Congress, suggested that the scientific management mechanism of HPV vaccination should be standardized, and the appointments of community vaccination clinics with various prices should be included in the "follow-the-bid" online platform, and personal review materials should be submitted online to generate an appointment demand list. At the same time, the progress can be checked, such as how many people are waiting in line and the estimated waiting time for vaccination. She also suggested that the development and investment of HPV vaccine should be increased, and the dosage and vaccination data of HPV vaccine in community clinics in this city should be regularly publicized.

　　Xu Tianyu from the College of Science and Technology of Jiangxi Normal University suggested that it is urgent to realize "vaccine freedom" from two aspects: "open source" and "supervision". On the one hand, the number of HPV vaccines needs to be increased. In addition to imported vaccines, the research and development of domestic HPV vaccines needs to be accelerated, so as to solve the dilemma of "one vaccine is hard to find" as soon as possible. On the other hand, the market supervision administration should standardize management, strictly investigate the source channels of vaccines and standardize the sales channels of vaccines. Only in this way can we break the interest chain of bundled sales.

The performance of the mobile phone business is sluggish, and HTC has put its treasure on VR.At present, the HTC Vive virtual reality helmet of the Bank of China has been officially launched, but the price of 6888 yuan has also discouraged many people.

To this end, HTC has adopted a more people-friendly approach in product promotion. At present, HTC has reached a strategic cooperative relationship with Shunwang Technology, the largest Internet cafe platform service provider in China, to jointly develop virtual reality business and form a competitive Vive ecosystem in public Internet places.

To put it simply, HTC will provide HTC Vive in the pilot Internet cafe for players to experience for free.At present, the detailed addresses of the first batch of Vive experience Internet cafes have been announced. Students who want to experience immersive VR, see if you have your home.：

1. Fei Fei Music Internet Cafe (Leling Road, Qingdao)

Address: No.93 Laoling Road, Qingdao, Shandong Province

2. Yibo E-sports Hall (Tianjin Beichen Store)

Address: Chenchang Road, Beichen District, Tianjin

3. Happy Garden Internet Cafe (Waitu Store)

Address: Units 301 -309, No.817 Hubin South Road, Siming District, Xiamen, Fujian

4. Sunshine Xinmiao (Taiyuan North Street Store)

Address: Floor 1, No.246 North Street, Xinghualing District, Taiyuan City, Shanxi Province

5. White Night Internet Cafe (Tsinghua East Road Store)

Address: Floor 3, Block B, No.25 Tsinghua East Road, Haidian District, Beijing

6. Xinsu Internet Cafe (wuxi new district Columbus Store)

Address: No.120, Columbus Commercial Plaza, Changjiang North Road, Wuxi New District, Jiangsu Province

7. Jiela Internet Cafe (Hangzhou West Lake Cultural Square Store)

Address: 301, Zone C, Xihu Cultural Square, Hangzhou, Zhejiang Province

8. BenQ E-sports Hall (Shijiazhuang wanda plaza Store)

Address: No.132-65, B2 Business, wanda plaza, Yuhua District, Shijiazhuang, Hebei.

9. League of Legends Internet Cafe (Expo Experience Store)

Address: Expo Center, Dongfeng Road and Wenbo East Road, Zhengzhou City, Henan Province

10. Wangyu Internet Cafe (Shenzhen Coastal City Store)

Address: 307C, 3rd floor, Tianli Central Business Plaza, Haide 3rd Road, Nanshan District, Shenzhen, Guangdong.

11. Wangyu Internet Cafe (Shanghai Yishan Road Store)

Address: No.488 Yishan Road, Xujiahui District, Shanghai

12. Clockwork Internet Cafe (Changsha Dongfeng Road Branch)

Address: 3F, podium building, No.9 Dongfeng Road Park, Kaifu District, Changsha, Hunan Province

13. D.S Room esports hall

Address: 8th Floor, Jinshatian Street, Longhu Hangzhou, No.560 Jinsha Avenue, Jianggan District, Hangzhou, Zhejiang.

14. Martian Internet Cafe

Address: No.123 Yingbin Avenue, Chengdu, Sichuan.

15. Springfield Huahua Internet Cafe

Address: Floor 1, Floor 2, No.88 Changjiang Second Road, Yuzhong District, Chongqing

16. Wheat Field E-sports Hall

Address: No.13-14, No.1 Kehua Street, Chengdu, Sichuan.

17. Milan Internet Cafe

Address: Floor 2, Building B, City Mall Pedestrian Street, Qilin District, Qujing City, Yunnan Province

18. Ivory Tower Internet Cafe (Diamond Shop)

Address: Shaoshan Road Building Materials Market (Garden 2 Village), Tianyuan District, Zhuzhou City, Hunan Province

19. ronin TES e-sports Internet cafe

Address: No.2, Floor 2, Building A, Qianda Garden, Putuo Road, Yunyan District, Guiyang, Guizhou

20. Munster Internet Cafe

Address: No.97 Dongting Street, Jiang ‘an District, Wuhan, Hubei.

After a lapse of one year, on May 15th, the US government once again used state power to block Huawei. Compared with the impact of last year’s "516 entity list", this attack is more accurate and thorough.

To put it simply, if any semiconductor company in the world wants to produce chips for Huawei, it needs to obtain permission from the United States first.

Why can the US government be so lenient? Because every semiconductor company in the world is using the software and technology of American companies more or less. This is the so-called "long arm jurisdiction".

Are semiconductor enterprises in China bound by this? Theoretically, this is the case, because some underlying technologies in China’s semiconductor industry chain can only adopt American technologies.

The United States’ comprehensive restriction and upgrading of Huawei’s chip industry covers the upstream software of chip design, the upstream equipment of chip manufacturing and the 7nm chip manufacturing mainly produced by TSMC. The US Department of Commerce has carried out a fixed-point precision strike on all links of Huawei’s chip industry chain.

The first thing is the upstream EDA software of chip design. Although Huawei can design chips, the high-end software EDA tools for IC design are still basically monopolized by three American companies: Cadence, Synopsys and Mentor. In the China market, these three EDA software companies occupy 95% market share.

As far as Huawei is concerned, since May 16 last year, the cooperation between the three major EDA manufacturers in the United States and Huawei has been terminated. This means that Huawei has not obtained new tools and new upgrade services since then, but it can continue to use EDA tools that Huawei has purchased and authorized. In other words, at present, Huawei Hisilicon can also use the old version of EDA for IC design.

However, in the long run, the localization of EDA software is imperative. Some analysts believe that the technical restrictions in the United States are bringing opportunities to the development of domestic EDA software in China.

Having said that, we must also be soberly aware of the technical gap between China and the United States in EDA software and the difficulty of domestic substitution. But at the same time, we should give up the illusion of "compromise and surrender" and seek the possibility of technological breakthrough.

Why is EDA software important?

If chip manufacturing is compared to building a building, IC design is the design drawing of the building, and EDA software is the design tool of this drawing, but the complexity of EDA software is n orders of magnitude higher than that of architectural design software.

EDA, the abbreviation of Electronics Design Automation, is a computer-aided design software system developed on the basis of electronic CAD technology, which integrates the latest achievements of applied electronic technology, computer technology, information processing and intelligent technology to automatically design electronic products.

Using EDA tools, electronic designers can design electronic systems from concepts, algorithms, protocols, etc., and can automatically process the whole process of electronic products from circuit design, performance analysis to designing IC layout or PCB layout on the computer. EDA technology can be widely used in many fields such as electronics, communication, aerospace, machinery and so on.

With the development of integrated circuit technology, EDA software is more and more synonymous with "chip design software tools" by the industry.

That is to say, EDA software is an important tool for chip design. However, due to the complex technology, fine division of labor and multi-technology synthesis of chip design, EDA software does not refer to only one or several softwares, but involves nearly a hundred different technologies and covers a variety of "point tools" software tool clusters.

EDA software can greatly improve the efficiency of chip design, and also has applications in chip manufacturing, packaging and testing. EDA, semiconductor materials and equipment together constitute the three foundations of integrated circuits.

Today, there are at least hundreds of millions to billions of transistors on a chip, and continuous simulation and verification are needed in the design process, which are inseparable from EDA software. Without EDA tools, no matter how high the level of chip designers is, there is no place for them.

From the basic role of EDA in chip design and manufacturing, its importance is self-evident; From the complexity of EDA software, its technical realization is very difficult.

Specifically, the front-end design of the chip includes chip specification formulation and detailed design, HDL coding, simulation verification, logic synthesis, static timing analysis (SAT) and formal verification. The back-end design includes DFT, FloorPlan, clock tree synthesis (CTS), Place & Route, parasitic parameter extraction, physical verification of layout and so on … …

Judging from the tools used in these design processes, it is almost monopolized by three American companies, Cadence, Synopsys and Mentor, which may disappoint many people who call for the localization of EDA software as soon as possible.

So, what challenges does the domestic substitution of EDA in China face?

What are the difficulties faced by EDA localization substitution?

We must first understand the characteristics of EDA industry. EDA is an extremely important key link in the integrated circuit industry chain, but it is also a highly centralized industrial link with relatively small output value.

In 2018, compared with the chip industry of nearly 500 billion US dollars, the market size of the whole EDA is only 9.715 billion US dollars. Among them, 70% of the market share is occupied by EDA giants Synopsys, Cadence and Mentor Graphics under Siemens. The global EDA industry has formed an oligopoly pattern of the three giants. In the China market, the three giants account for more than 95% of the EDA market share, with a higher concentration.

This has not only greatly squeezed the development space of China’s EDA industry, but also seriously affected the pace of domestic research and development of EDA software in China. In the 1990s, when the United States lifted the ban on EDA in China, the advanced EDA software from the United States quickly came to China, attacking the city all the way, which disrupted the pace of independent research and development of EDA in China, and "market for technology" became the path dependence for the next decade.

Compared with American high-end and mature EDA industrial chain, what are the difficulties in the development of EDA industry in China?

The first is the technical threshold. EDA tool is a "multi-tool" software cluster. At present, Chinese enterprises have achieved breakthroughs in some tools, but at present, more technology needs to be accumulated in the complete and available full-process tool chain, which cannot be completed in a short time.

Secondly, the technology integration is high. EDA is the result of long-term cooperation among chip design companies, fabs and EDA software vendors, which requires a lot of talent investment, mathematical optimization and experience accumulation, and cannot be achieved overnight. At present, many EDA enterprises not only provide EDA software, but also provide IP design, which can not only reduce costs, but also improve IP quality by developing some customized EDA functions, and become the main popular mode at present. Our country’s integrated design ability in advanced process is obviously behind the foreign 2-3 generations.

Once again, it is the talent threshold. In terms of EDA software R&D talents, there are not many universities in China that set up EDA majors, and the Internet and financial industries attract a large number of software development talents, which leads to a serious shortage of EDA software R&D talents.

Finally, China also needs to strengthen the intellectual property protection of EDA technology.

At present, EDA has become the key bottleneck for China’s semiconductor industry to achieve autonomous control. In the field of EDA software, China has owned enterprises such as Huada Jiutian, Guangliwei, Xinhe Technology, Lanhaiwei, Jiutongwei, Bodawei, Jilun Electronics, Kejingda, Chuanglian Zhiruan, etc. It is necessary to achieve a comprehensive breakthrough from "point" to "surface" in overcoming the above problems.

How to break the situation of EDA software localization replacement?

Let’s look at the current situation first. Before the 516 entity list incident last year, Huawei obtained the permanent authorization of EDA tools at that time. Because these EDA software can lead the actual chip manufacturing process for two or three years, the EDA ban will not have much impact on Huawei’s chip design in the short term.

However, if Huawei can’t get the updated and upgraded EDA tools because of the continuous technology export ban, it will greatly restrict Huawei’s iterative development in higher-end chip technology.

Not long ago, Huawei tried to design chips jointly with stmicroelectronics (STM.N). One of its purposes was to obtain EDA design technology to find technology records beyond the US technology ban. However, with the intensification of this round of sanctions, this cooperation may also be terminated.

At present, Huawei can only transfer 14nm chip manufacturing orders to domestic SMIC. In the manufacturing of 5nm and 7nm chips, SMIC still lags behind TSMC’s technology and process. One of the big reasons is that domestic manufacturers who provide chip design software for SMIC cannot achieve a breakthrough in the design of high-end chips.

In the long run, it is imperative to replace EDA software in China. The new round of technical restrictions in the United States has strengthened the determination and speed of China’s semiconductor industry’s autonomy. And a series of factors are also quietly promoting the development and break of EDA software industry in China.

First of all, the leading EDA enterprises in China are receiving a number of grants and strategic investments from the state and investment institutions.

On the evening of May 15th, SMIC announced that the second phase of the State Integrated Circuit Fund and the second phase of the Shanghai Integrated Circuit Fund had injected US$ 1.5 billion and US$ 750 million into SMIC South respectively. This will greatly expand the production capacity of 14 nm wafers.

Similarly, the country is also increasing the resource inclination of EDA industry and promoting the independent development of EDA software. Among them, Guowei Shenzhen’s special sub-project "Development and Application of EDA System in Chip Design Whole Process" ("the project") has been approved by the national major science and technology special project, and will receive a total of about 400 million yuan from the project. As the largest EDA company in China, Huada Jiutian has also received several rounds of investment of several hundred million yuan from various investment institutions in China in recent years.

In terms of policy support, in the face of the situation that domestic EDA software is not used, domestic EDA software is given a certain purchasing inclination. For example, the "Several Measures on Accelerating the Development of Integrated Circuit Industry" issued by Shenzhen recently introduced the first domestic policy to explicitly support EDA R&D, including funding incentives for EDA R&D and subsidies for purchasing domestic EDA software.

Secondly, at the market level, the new development of domestic IC industry also brings some opportunities for the development of domestic EDA software.

At present, new technologies such as 12nm and 7nm are widely used in domestic chips, which urgently requires domestic EDA software to develop products comparable to international manufacturers. Only in the design based on the most advanced technology, it is possible to find the defects of the process and potential product opportunities. Of course, this poses a certain challenge to domestic IC design enterprises, but in the case that the United States can "get stuck" at any time, we must pay some trial and error costs to promote the progress of domestic EDA software.

The rise of new applications such as AI chips and IoT chips has brought new challenges to the existing EDA industry and chip design process, and also brought many new technical research directions to small and medium-sized EDA companies, which has become a new opportunity for them to break through the barriers of EDA giants.

Thirdly, AI technology, as a new variable, is bringing a breakthrough to domestic IC design.

Recently, Google is using AI algorithm to learn the layout of chips, so that products beyond manual design can be designed in a shorter time. Similarly, AI technology is being widely used in EDA companies. For example, Empyrean Mcfly, which was launched by Huada Nine Days ago, uses AI algorithm to accelerate IP verification, and uses AI to learn previous IP cases to verify the new IP, and the verification accuracy reaches about 99%.

In addition, if we want to look at the "broken core" incident in the United States from a longer-term perspective, we must realize that perfect property rights protection of technological innovation and mature talent training mechanism are the fundamental ways for China to achieve core technology in its own hands.

Finally, we should realize calmly that the domestic substitution of EDA software and other related core technologies in chip manufacturing is definitely not a natural thing. Think about the prosperity and decline of Japanese semiconductors, which is our lesson.

In the short term, the prohibition of existing foreign EDA software will not have a fatal impact on Huawei, but Huawei is facing a more dangerous situation because of the upgrade of the entire semiconductor technology in the United States. Actively playing games and seeking "spare tires" have become two preparations to be carried out at the same time.

In the long run, the country and the industry can no longer have the illusion of "compromise" and "seeking to let go" of the United States. All sectors of the industry must show patience and determination to invest in the development and research of basic science and core technologies.

On this more difficult road, China’s chip industry and related science and technology industries should be prepared for long-term suffering. This is especially true for EDA software industry.

Wang Chuanfu, chairman and president of BYD, announced at BYD’s intelligent strategy conference on the evening of February 10 that the high-level intelligent driving system "Eye of God" was officially released and divided into three versions. Among them, the three-laser version (DiPilot 600) is mainly used for looking up models, the laser version (DiPilot 300) is mainly used for Tengshi and BYD models, and the three-eye version (DiPilot 100) is mainly used for BYD models. (Securities Times)

　　　　On March 16th, Lianyungang Telecom Branch sent a complaint and feedback to our station, saying, "After investigation, on August 6th, 2011, with the consent of the users, the free experience ITV network TV service was installed. After three months of free experience, the staff did not remind the users to handle the disassembly procedures, resulting in ITV fees from November 2011. After discovering that the ITV fee was charged, the local telecom branch office communicated with the user in time, and immediately refunded the overcharged fee and obtained the understanding of the user. "

　　　　"The global eye fee mentioned by another user is the monthly 1 yuan fee for opening ten joint defense businesses on June 22, 2010 (the project shown on the bill is global eye business). This business is led by the public security organs and the local township government, and the technical defense business of Ping’ an Township for the masses is collected in the telecom phone bill after being confirmed by the user. "

　　　　Lianyungang Telecom Branch also said, "This complaint was not made by the user’s family, and the owner didn’t know about it." And provides a "proof" with the user’s signature and fingerprint.

　　　　However, the reporter verified that after the two parties settled the certificate, Telecom promised to refund the user the fee for the service for five months, and the user had to sign the certificate to deny the complaint. "Because we reconciled at that time, it was natural for Telecom to write like this …" Mr. Yuan said.