Boom! Bang! God!

The fireworks set off in the Bird’s Nest the other night must have surprised you in front of the screen. What, you didn’t see it? Don’t panic! This will take you back to the fireworks you missed.
1. The origin and history of fireworks
Fireworks, also known as fireworks, fireworks, firecrackers, fireworks and so on, originated from gunpowder, one of the four great inventions in ancient China. The exact time when fireworks were produced is not available, but Emperor Yangdi of Sui Dynasty wrote a poem "Lights shine on trees, and seven flowers bloom" ("Poem on Building Lights in the thoroughfare on the 15th day of the first month and Rising to the South Tower at night"), which tells the scene of setting off fireworks (that is, fireworks) during the Lantern Festival. This shows that at least in the Sui and Tang Dynasties, there was a rudiment of fireworks used to celebrate festivals and entertain people.
The "shelf fireworks" or "bonsai fireworks" in the Song Dynasty have reached a considerable scale. Xin Qiji, the representative of the unrestrained poet, once wrote the words "Thousands of trees bloom in the east wind night, and the stars are like rain" ("Jade Case, Yuanxi"), which is a vivid and vivid description of it.
During the Yuan and next years, many poets and writers have written accounts of firecrackers and fireworks. For example, Zhao Meng’s poem "Giving Fireworks" in the Yuan Dynasty "is as brilliant as stars and as loud as fire." It describes the lively scene of setting off fireworks on the fifteenth day of the first month, comparing fireworks to meteors and fire attacks.
With the continuous improvement of the production technology and scale of fireworks in the Qing Dynasty, fireworks not only appeared in palaces and the residences of dignitaries, but also became a habit for people to set off fireworks during festivals. In order to strengthen the management of fireworks, the Qing Dynasty’s "Laws of the Qing Dynasty" stipulates that all fireworks workshops must be approved by the government before they can be listed, and fireworks must be set off in specified places.
2. Why can fireworks explode?
After understanding the history of fireworks, what is it? Xiaobian, this will take you to understand.
Fireworks,It is an object made of gunpowder and metal powder, which will burn, explode and bloom with colorful light after being ignited by fire, and is usually used outdoors.
black powder
The principle of fireworks is similar to that of firecrackers, and its structure includesblack powderandYaoyin(fuse) Black powder is what we often call "one sulfur, two nitrates and three charcoal":
S + 2KNO3+ 3C = K2S + N2↑+ 3CO2↑
The condition of the above reaction is ignition, and sulfur and potassium nitrate are oxidants.
Sulfur,It is a light yellow brittle crystal or powder with a special odor. It is a flammable solid, which can be made from natural sulfur ore or pyrite, carbon and oxygen at high temperature.
sulphur
potassium nitrateIt can be extracted from nitrate soil. The main principle is to use potassium ions in plant ash to replace sodium ions in nitrate soil, thus generating potassium nitrate. Contact with organic matter can cause combustion and explosion.
potassium nitrate
charcoalIt is the dark brown or black porous solid fuel left by incomplete combustion of wood or wood raw materials or pyrolysis under the condition of air isolation.
charcoal
A heat source is provided externally to ignite the fuel. The oxygen released by the decomposition of potassium nitrate makes charcoal and sulfur burn violently, producing a lot of heat, nitrogen, carbon dioxide and other gases instantly. The chemical reaction caused the explosion, and most of the energy released during the explosion was converted into light and appeared in our eyes.
3. How do fireworks?
HeavenAnd produce different colors?
Fireworks are generally sealed, and after the explosion reaction, a lot of heat and gas will be generated. In a closed environment, due to the poor sealing of the upper and lower ends, gas will be ejected from below. According to Newton’s third law, the fireworks get upward power, and the internal energy of gunpowder is converted into heat energy, kinetic energy and potential energy of the fireworks. When the gunpowder is exhausted, the fireworks bomb continues to rise due to inertia, and at this time, the internal explosives are ignited and explode in the sky.
Internal structure of fireworks
In the process of making fireworks, some luminescent agents and chromophores are usually added to make fireworks emit colorful colors. Both the luminous machine and the chromogenic agent contain metal compounds, and different kinds of metal compounds will emit different colors of light when burning. This is what we often say.flame reaction.
Flame reaction color of common metals
Xiaobian reminds everyone to pay attention, flame reaction isphysical changeDon’t remember wrong.natureEvery element has its own unique spectrum. When heated, atoms’ electrons will absorb energy and jump to a higher unstable energy level, and then return to the previous low energy level and release electromagnetic waves with a specific wavelength. The electromagnetic waves released by some metals are just in the visible light band, and we see colorful colors.
A colorful fireworks display at a party
4. Xiaobian has something to say
Presumably, now that you have a better understanding of fireworks, you can tell (chui) to (xu) other people (bo) the next time you watch fireworks. Fireworks have a history of thousands of years in China, and it has long been our habit to set off fireworks on holidays. Everyone should abide by relevant regulations and pay attention to safety when setting off fireworks ~
Finally, let’s enjoy the beautiful fireworks again ~
Note: The pictures in the article come from Baidu, Weibo and other networks; If there is any infringement, please contact to delete it.
Source: Institute of Semiconductors, Chinese Academy of Sciences
Editor: dogcraft
Reporting/feedback

Liu Deqin, deputy to the Provincial People’s Congress: A new chapter of the "Dragon Gate Array" before the reunion dinner, bearing in mind the entrustment and starting again.

Sichuan online reporter Zhao Rongchang Luzhou observation Zhou Mengying text/map/video

"At noon, come early! We have a party before dinner ‘ Longmen array ’ 。” At 8: 30 on January 30, Liu Deqin, deputy of the provincial people’s congress and secretary of the Party branch of Luosi Village, Fuji Town, Luxian County, Luzhou City, shouted at several large lobster farmers and took the bag out of the door.

Along the ridge, she soon came to the breeding base of Xiong Dianjun, a lobster farmer of group 4 in Luosi Village. "Business is good these two days." While greeting, she helped Xiong Dianjun collect the fishing net. Looking at the lively lobster, Liu Deqin smiled and helped Xiong Dianjun put it into the bucket.

Liu Deqin and farmer Xiong Dianjun discuss lobster culture technology.

As the Spring Festival approaches, lobsters in Luosi Village are on the market earlier in the province. Liu Deqin is as busy as lobster farmers. After the end of the provincial two sessions, she went to the homes of several large farmers almost every day.

"This year’s provincial government work report mentioned that it is necessary to promote new urbanization and overall rural revitalization." Liu Deqin did not forget to exhort Xiong Dianjun, "Lobster is the dominant industry in our village, and we must not neglect the quality in order to grab the market."

As a provincial poverty-stricken village in the past, Luosi Village once faced the pain point of weak village collective economy after poverty alleviation. In 2019, the village started to implement a 600-mu rice and shrimp breeding project, which quickly developed into the leading industry of the village collective economy. In 2023, Luosi Village promoted the development of lobster breeding industry in the village through the existing large-scale breeding households, built more than 100 acres of lobster demonstration bases and organic rice planting bases, and established six specialized cooperatives. The sales of lobster breeding industry in the village exceeded one million yuan, driving hundreds of people to achieve employment at home.

"The lobster farming industry is too single, which is not conducive to the high-quality development of the village collective economy." At 10: 25, a villager stopped Liu Deqin and spoke his mind. "Many representatives and I have discussed this issue during the two sessions of the province, and we will put it ‘ Longmen array ’ When you are, listen to everyone’s thoughts. " Liu Deqin greeted the villager and rushed to the meeting point together.

At 11 o’clock, several large lobster farmers in the village gathered together one after another.

"The government work report mentioned many measures to support rural revitalization and improve the development level of rural industries, which is an opportunity for our development." Liu Deqin took the lead. "For example, we should implement special projects for deep processing of agricultural products and build agriculture into a modern big industry."

Liu Deqin organized large lobster farmers to talk about development.

How to accurately seek the development ideas of Luosi Village in the fast lane of rural revitalization? Liu Deqin said, "Everyone has something to say. Everyone is the protagonist of the village collective economic development. We work together."

"I think it is necessary to fully tap the characteristics of the snail village industry, and strive to build the shrimp in snail village into the brand benefits it deserves, so that it can form a combined product with lobster." A farmer attending the meeting suggested.

"I suggest combining lobster fishing with rural tourism to attract tourists to fish and taste lobsters and develop rural tourism." Another farmer took over the topic.

Listen and remember. Soon, Liu Deqin’s notebook was full of pages.

"Strengthen industry to drive wealth." Talking about the plan for the new year, Liu Deqin also has his own thoughts: to make use of the existing demonstration base for lobster breeding, expand the breeding area, and plan to lead large households and villagers’ representatives to go out for study and study, so as to make lobster breeding in this village bigger and stronger.

"Of course, there are also many problems." Liu Deqin paused, for example, and said, "The existing lobster base service road is irregular and irregular, and plans to help them maintain the service road; Lobster and rice have no registered brands, and the next step must be implemented. "

Do you need to open AC in winter?

In winter, if the windshield fogs seriously, turning on the refrigeration switch (AC) of the automobile air conditioner can effectively remove the fog. Car air conditioners are used not only in summer, but also in winter. Automobile air conditioner can not only cool, but also heat, so it is needed almost every day in winter and summer. When the refrigeration switch is turned on, the compressor will be combined, the engine will drive the compressor to run, and the refrigerant will expand and absorb heat in the evaporation box, cooling the evaporation box, and the cooled evaporation box will cool the wind blown by the blower, thus blowing cold air. But in other cases, there is no need to turn on AC.

Kavan Automobile, a brand new energy commercial vehicle brand of BAIC Group, was officially released.

On January 27th, Calvin Automobile, a brand new energy commercial vehicle brand under BAIC Group, was officially released. In the future, Calvin Automobile will launch brand-new platform products around the two major technical routes of pure electricity and hydrogen fuel cells, accelerate the transformation of Beiqi Futian into new energy, and help the construction of the Capital Science and Technology Innovation Center.

Nearly 500 people including Zhi Xianwei, deputy secretary of Changping District Committee, Su Guobin, deputy director of Beijing Economic and Information Bureau, and Jiang Zili and Chang Rui, leaders of BAIC Group, attended the conference.

New positioning, activation and development of new kinetic energy

In recent years, BAIC Group has been based on the construction of the "four centers" in the capital, integrated into the "five-child linkage" development pattern, adhered to science and technology-driven development, and continuously promoted the top-level strategic deployment in the field of new energy. The "BLUE Plan" released in 2022 shows that BAIC will further promote comprehensive new energy utilization and intelligent networking, build a full range of green and low-carbon products for passenger cars and commercial vehicles, and fully realize peak carbon dioxide emissions in 2025, and fully decarbonize products and operate carbon neutrality in 2050.

At present, BAIC Group is accelerating the pace of comprehensive new energy strategy, based on the new energy technology innovation of "pure electricity+hybrid", promoting the new energy strategy to land in the whole value chain of technology, products and supply chain, and the genealogy of new energy products is gradually clear in the rapid adjustment of product structure. Among them, in the field of passenger cars, supported by two brands, Extreme Fox and Beijing, a new energy-based product system of BAIC’s own brand passenger cars is composed of pure electric power and hybrid power. In the field of commercial vehicles, Beiqi Foton has formed a full product matrix of commercial vehicles covering all technical routes of pure electricity, hybrid and hydrogen fuel, covering the whole scene.

In this context, Beiqi Foton has made clear that the new energy strategy is the first strategy for the company’s development. In 2022, BAIC Foton and Bosch, Yihuatong, BAIC Investment Co., Ltd. jointly invested and established Calvin Automobile, focusing on a brand-new pure electric and hydrogen fuel platform, positioning to create a low-carbon and zero-carbon industrial ecology, deeply cultivating the global zero-carbon heavy truck, and committed to becoming a unicorn enterprise in the field of new energy vehicles around the world. In the future, Calvin Automobile will introduce more high-quality industrial chain partners as investors, and promote the healthy development of the company through the asset-light strategy way with a more flexible shareholding structure.

At the press conference, Zhi Xianwei, Su Guobin, academicians of China Academy of Engineering, professors of Beijing Institute of Technology, Sun Fengchun, Tsinghua University and Zhang Xiliang, members of the National Committee of Experts on Climate Change, delivered speeches on the development of new energy automobile industry and the development trend of the industry at Beijing and district levels, respectively, and made suggestions on the development of Kawen automobile. Jiang Zili, deputy secretary of the Party Committee of BAIC Group, said that the development of Calvin Automobile will play an important role in supporting and promoting BAIC to implement the "double carbon" strategy and realize the transformation and upgrading of the commercial vehicle sector. The Group will fully support the development of BAIC Foton and Calvin Automobile in the field of new energy commercial vehicles.

Brand new and build a green ecosystem

After the establishment of Calvin Automobile, the company’s headquarters was settled in the Future Science City of Changping District. Over the past year or so, Calvin Automobile has introduced a large number of talents to build a new system around the technology, products, supply chain and brand of new energy commercial vehicles. At the press conference, Calvin Automobile released a brand-new brand strategy.

Calvin Automobile brand will focus on the bright future of new energy technology leadership, user value creation and sustainable development, take "making every kilometer better" as its brand mission, and devote itself to delivering intelligent vehicle services that exceed customers’ expectations, achieving the leading position in platform technology and new energy technology, developing a new eco-business model with high intelligence and building a sustainable green energy business system.

The brand logo of Calvin Automobile was also officially unveiled at the meeting. Among them, the Chinese word "Ka" is fully integrated with the image of leaves, which means that Kawen absorbs natural energy and empowers the industry to develop sustainably with low carbon through the transformation of new energy technology and scientific and technological ecology. English logo "CAVAN", the initial letter C stands for Carbon, which reflects the firm commitment to the development of low-carbon era; The suffix n stands for New Energy and Nature, which promotes the harmonious coexistence of green transportation and nature with new energy technology innovation; AVA is the symbol of Calvin’s "3A" spirit-Advanced new energy technology, Advanced design concept and Advanced quality.

At the same time, Calvin Automobile will build a sustainable zero-carbon ecosystem in the whole value chain with all walks of life through the creation of zero-carbon supply chain, zero-carbon factory and zero-carbon products from the three dimensions of "car-chain-circle". Qin Zhidong, general manager of Calvin Automobile, said that the company promised to achieve carbon neutrality in the whole value chain by 2040.

Brand-new products exceed expectations to meet demand

At present, Calvin Automobile has built the Master architecture technology through independent innovation, focusing on breakthroughs and innovations in core technologies such as vehicle platform architecture, electronic and electrical architecture, fuel cells, hydrogen storage systems, and Sanpower. The company also pioneered a cross-platform, extensible and highly heterogeneous centralized electronic and electrical architecture for commercial vehicles, developed an industry-leading high-power hydrogen fuel cell engine and a liquid hydrogen storage system focusing on trunk transportation, and independently developed cutting-edge new energy and intelligent technologies such as high-performance electric drive bridges.

At the product level, Kavan focuses on two technical routes, pure electric and hydrogen fuel cells. All products are developed in the forward direction, focusing on three platforms, namely VAN, light truck and heavy truck, to create products that meet the needs of urban logistics, medium and long-distance trunk logistics and other scenes, and meet the needs of users with the characteristics of light weight, low energy consumption, long battery life, intelligence and high comfort.

In addition, Calvin Automobile will optimize the supply chain construction, create a green supply chain, and actively explore the continuous innovation of business ecology to provide users with new energy solutions integrating vehicle, intelligent transportation capacity, charging facilities and energy management.

Qin Zhidong introduced that in the next three years, Calvin Automobile will launch three platform products in domestic and foreign markets, and this year will be the first to launch a highly intelligent pure electric VAN product.

Well-known football training institutions have been trapped in the "closed door" and attracted parents and employees to share dividends as shareholders.

CCTV News:Recently, a well-known football training institution in Beijing — — The news that Stonehenge touchdown suddenly closed down came out, and a few weeks ago, this training school had just resumed teaching after the epidemic and was even recruiting new students. What makes parents feel more anxious is that many of them have paid tens of thousands of yuan in tuition fees in advance. Can the training institutions refund the tuition fees that may be as high as tens of millions of yuan to parents?

Mr. Xiong, who lives in Chaoyang District, Beijing, began to enroll his children in rugby training institutions in Beijing Jushi touchdown in 2016. So far, he has studied rugby for four years. After January this year, affected by the epidemic, all campuses of the training institution were closed, and his campus has not resumed classes so far. In August, the Chaoyang Park Campus of the institution began to resume training, which made him see the hope of resuming classes. However, just this week, in the WeChat group of his team, a message sent by the coach made him panic instantly.

Just last November, Mr. Xiong had just paid more than 20,000 yuan in tuition fees for two years, and had not attended a class. Such news of suspension of classes made him unacceptable. Like Mr. Xiong, many parents of Jushi touchdown Beijing Direct Campus got the news that they could not continue their classes this week. In the face of this unexpected situation, parents were caught off guard, because just last weekend, Beijing Chaoyang Park Campus was still in normal training and recruiting new students.

It is understood that Jushi touchdown was established in 2012 and is one of the earliest youth American football training institutions in China. Jushi touchdown adopts two modes: direct operation and joining. At present, the campus has covered 14 cities in China, including North, Shanghai, Guangzhou, Shenzhen and Hangzhou. This time, the crisis of suspension of classes is all directly operated campuses in Beijing. At present, members’ parents have formed a number of rights groups, and now the number has exceeded 2,000. The remaining tuition fees of these parents range from several thousand yuan to more than 50 thousand yuan. According to the current number of rights defenders, the amount involved exceeds 10 million yuan.

What makes it hard for parents to accept is not only the economic loss, but more importantly, they are worried that their children’s enthusiasm will be frustrated. Many parents have not even told their children who are looking forward to resuming classes this cruel fact.

Beijing office staff went to the building, and a large number of coaches and employees left.

The sudden suspension of classes made parents feel unprepared, but in fact, it was not only parents and students who suffered. The reporter learned from the investigation that after January this year, many coaches and employees of Stonehenge touchdown suffered from unpaid wages. Now most coaches have left their jobs, and the office of Stonehenge touchdown has been deserted.

Many parents said that classes resumed on August 8th at the Jushi Touchdown Chaoyang Park Campus. Just last weekend, some people took part in training here. The reporter learned that Jushi Touchdown also attended classes here for more than four years, so is this venue still being renewed? With questions, the reporter came to the venue management office of Chaoyang Park.

Staff of Beijing Chaoyang Park Site Management Office:We have terminated the contract, and they have not renewed the lease. It expired in February this year, so they have not paid us any more. It used to be rented every year, but now it was rented temporarily for a month last month, and now it is not rented.

Later, the reporter went to the office address of Jushi Touchdown in Chaoyang District, Beijing. This joint office space accommodates many companies at the same time. In the office area of Jushi Touchdown, we can see that their signs are still hanging in a conspicuous position, but the empty desks and closed office doors all show that there is no office here, and some items have not been moved through the glass. The whiteboard on the wall says that from January to August, the sales performance of the old members of the top three employees exceeded 500,000.

Since then, the reporter has repeatedly tried to call the official customer service phone number of Jushi touchdown and the phone number of the person in charge, all of which are in a state of being unable to get through or no one answered. Many parents said that now they can only contact the coaches and consultants who sold their lessons directly to them before, but at present, most of them have left their jobs. The reporter also contacted several of them.

Attract parents and employees to be shareholders, share dividends, make a touchdown, or circle money in disguise.

According to public information, Jushi Touchdown won two rounds of financing of 10 million yuan in 2017 and became a star startup company in this field. Then, is the sudden suspension of classes in this large training institution related to this year’s epidemic? Where did the financial difficulties begin?

Many parents said that at the end of last year, Jushi touchdown concentrated on renewing the fees of old members at very favorable prices. Some old members even continued their previous courses for two years before they finished one year.

In addition to allowing members to renew their fees in advance at a low price, Jushi Touchdown also launched a founding member activity in mid-2018. Members can get a five-year course by paying 50,000 yuan, and they can also get dividends from the campus. According to reports, in addition to recruiting members to buy shares, the company also encourages employees to invest thousands to tens of thousands of yuan in the company and participate in internal investment dividends.

In fact, the suspension of classes in the direct-operated campus in Beijing is not the first time that Jushi touchdown has fallen into this crisis. At the end of last year, the two campuses of this institution in Shanghai took measures to close stores, and hundreds of thousands of arrears owed by many students have not been refunded since then. On the enterprise search website, there are dozens of risk warnings about "Stonehenge touchdown", and the company has been listed as "abnormal operation" in October 2019.

Experts believe that since the outbreak this year, institutions with operational problems have quickly exposed the crisis. For consumers, it is necessary to keep evidence such as contracts, receipts, payment records, etc., and take litigation, arbitration and other means to safeguard their rights and interests when necessary.

Stonehenge’s touchdown responded that "there is no death" and the fee was refunded and the class was resumed.

Today, Jushi Touchdown posted a message on its WeChat WeChat official account that "Jushi is not dead". However, the company did not respond to parents’ concerns about whether the fee can be refunded and whether the class can continue. In recent years, there have been news that training institutions have stopped classes and run away. In order to prevent this from happening, the General Office of the State Council issued the Opinions on Standardizing the Development of Off-campus Training Institutions in August 2018, which clearly stipulated that off-campus training institutions should not charge fees for more than three months at a time. However, at present, many training institutions still require members to pay a large amount of tuition fees in advance. We also remind consumers to pay special attention to avoid falling into the trap of low-cost fees when recharging.

Xi ‘an launches 60 methanol taxis, experts and four "more" to dispel doubts about old drivers.

On December 20th, the first batch of 60 methanol taxis in Xi 'an were unveiled. On the same day, the first batch of 60 methanol new energy taxis in Xi 'an were put into operation, which is another city in China where methanol vehicles were put into operation after Jinzhong, Baoji, Lanzhou, Shanghai and Guiyang. Image source: vision china

  On December 20th, the first batch of 60 methanol taxis in Xi ‘an were unveiled. On the same day, the first batch of 60 methanol new energy taxis in Xi ‘an were put into operation, which is another city in China where methanol vehicles were put into operation after Jinzhong, Baoji, Lanzhou, Shanghai and Guiyang. Image source: vision china

  Cctv news(Reporter Wang Jiazhu) On December 20th, the first batch of methanol taxis in Xi ‘an were officially put into operation. Although only 60 vehicles were put into use, this new fuel vehicle still attracted the attention of the outside world. How much less can methanol fuel emit than gasoline? Can the old taxi drivers be satisfied with the power and economic applicability?

  Since 2012, the pilot work of methanol vehicles has been carried out in 10 cities in China, including 4 in Shaanxi. Liu Shengquan, a professor at Chang ‘an University, as the leader of the expert group on the pilot operation of methanol vehicles in Shaanxi Province, presided over the pilot project in Shaanxi. On December 24th, Liu Shengquan accepted an interview with CCTV reporters on related issues.

  Cleaner PM2.5, less emissions by about half

On December 20th, the first batch of 60 methanol taxis in Xi 'an were unveiled. Image source: vision china

On December 20th, the first batch of 60 methanol taxis in Xi ‘an were unveiled. Image source: vision china

  The methanol car is not filled with methanol gasoline, but a clean fuel called methanol M100 is promoted in Xi ‘an, with a methanol content of 99.9%. Traditional gasoline is a mixture of more than 100 different hydrocarbons, and the pollutants produced after combustion are carbon monoxide, hydrocarbons, nitrogen oxides, etc., which is the main source of PM2.5 formation.

  "After the combustion of methanol M100, there are also conventional emissions such as carbon monoxide, hydrocarbons and nitrogen oxides, but the emissions of carbon monoxide and hydrocarbons produced by methanol M100 are reduced by 45%-60% and nitrogen oxides by 20%-25% compared with the same amount of gasoline." Liu Shengquan said that because gasoline is a mixture, its molecular structure has 6-12 carbons, while the molecular structure of methanol M100 has only one carbon, so methanol M100 is much cleaner than traditional gasoline.

  Save more money and spend half of it every 100 kilometers.

There is a gas station in Xi 'an that can fill methanol M100. At present, there are 7 gas stations in Xi 'an that can fill methanol fuel, and this number will increase to 45 in the next year. (Wang Jiazhu/photo)

  There is a gas station in Xi ‘an that can fill methanol M100. At present, there are 7 gas stations in Xi ‘an that can fill methanol fuel, and this number will increase to 45 in the next year. (Wang Jiazhu/photo)

  On December 23rd, the reporter saw in a gas station that can be filled with methanol M100 in the West Third Ring Road of Xi ‘an that the price of M100 per liter is 1.9 yuan. In contrast, the current price of No.95 gasoline in Xi ‘an is 6.63 yuan per liter, and the natural gas is 3.2 yuan.

  According to Liu Shengquan, according to the previous pilot situation, taxis in Xi ‘an will burn about 10 liters of gasoline, 10 cubic meters of natural gas and 16 liters of methanol M100 for 100 kilometers. "It seems that methanol M100 is even less burn-resistant, but converted into price, 66 yuan is needed to add gasoline, while methanol M100 only needs 32 yuan, which can save at least half of the money."

  In addition, according to the relevant support policies issued by Shaanxi Province, for the purchase of methanol, ethanol, hydrogen fuel and other cars produced in the province, Shaanxi will also subsidize 10,000 yuan for each heavy truck and 5,000 yuan for each passenger car, and the enterprise income tax will be reduced by 15% for methanol automobile enterprises.

  More power is 3%-5% higher than that of gasoline vehicles.

  After 60 methanol vehicles were put into the market this time, questions about the power and toxicity of methanol M100 appeared on the Internet. In an interview with a CCTV reporter, Professor Liu Shengquan gave a detailed introduction to this.

  "In fact, the power of methanol M100 car is 3-5% higher than that of gasoline, which is why taxi drivers say that this car is lighter and even has a sense of pushing back after driving, while the power of natural gas car is 20% lower than that of gasoline car." Liu Shengquan said.

  Regarding toxicity, Liu Shengquan explained that methanol is indeed toxic, but in the classification of liquid toxicity in China, methanol and gasoline are both moderately toxic. "People’s worries are justified, because methanol has a fragrant smell and gasoline is pungent, so methanol is more easily misused than gasoline, but it will not be poisoned as long as it is not misused."

  In addition, Liu Shengquan said that methanol is the same as gasoline in transportation, storage and filling, and its ignition point and volatility are not as good as gasoline, so it is safer in practical use.

  It is more convenient to take the bus lane, and there is no limit to the number.

  This time, only 60 methanol taxis were put into use in Xi ‘an, accounting for a very small proportion of tens of thousands of taxis. The reporter failed to hit them for three consecutive days. But after two years, this proportion will be greatly strengthened. According to the support policy issued by Shaanxi Province in July, by the end of 2019, the province will also invest 20,000 methanol taxis, of which 10,000 will be in Xi ‘an.

  Xi ‘an also encourages units and institutions to give priority to purchasing methanol vehicles. On the basis of 15 filling stations that have been built and 7 have been operated, 45 M100 methanol filling stations will be built by 2019. Methanol vehicles are not only not restricted by the relevant restrictions, but also allowed to drive in bus lanes and park in public parking lots (spots) for less than 2 hours for free.

  "Compared with natural gas, methanol M100 is liquid and does not need pipelines, so the filling station will be established soon, and the technical difficulty of methanol vehicles is not great. I believe it will be popularized soon." Liu Shengquan revealed that at present, many foreign and domestic automobile manufacturers have come to Xi ‘an to have a discussion on methanol vehicles.

How to eat warm and healthy fruits in this cold winter?

The temperature is low in winter

Dare not eat cold fruit.

Worried about upset stomach.

Cook the fruit and eat it

Is it delicious and warm?

The nutrition of heated fruit is "discounted"

Are these statements true?

How to eat warm and healthy fruit in cold winter

Today, Xiaobian will answer you!

01

It’s good to eat fruit heated!

After heat treatment, the fruit hardness is reduced and the texture becomes soft.Easier to chew. When fruits are heated, they can also soften fibers, inactivate enzymes and kill pathogenic bacteria.Suitable for people with weak digestive function..

Soluble sugar is an important factor to measure the quality of fruit. The high content of soluble sugar in fruit makes the fruit sweet and delicious. The content of soluble sugar in fruit can be greatly increased by heating, so the fruit tastes sweeter when cooked.

02

But not all fruits are suitable for heating.

Heating will lead to the oxidation of vitamin C in fruits. The higher the heating temperature, the faster the oxidation rate.

Fruits with low vitamin c contentSuch as apples, peaches, pears, bananas, etc., can be eaten by heating. Although heating will cause the loss of vitamin C in these fruits, the loss of minerals, dietary fiber and antioxidants contained in them is not great.

Fruits rich in vitamin c, such as winter jujube kiwi fruit, it is best not to heat it.

03

How to heat the fruit better?

Heating fruit can be usedSteaming, boiling, baking or microwave heatingThe way

You can control the heating time according to your own preferences. Generally, it can be boiled for about 2 minutes after the water is boiled. At this time, the surface of the fruit is warm and suitable, the fruit is warm and delicious, and the soup is sufficient.

04

How much fruit is appropriate to eat every day?

The Dietary Guidelines for China Residents (2022) points out that healthy adults consume it every day.200 ~ 350gFruit is more suitable.

A medium-sized apple is about 200g, a kiwi fruit is about 100g, and a banana is about 120g after peeling. It is suggested that two or three varieties should be selected and matched reasonably every day to make the nutrition complementary.

05Fruit does not replace vegetables!

Vegetables and fruits differ in the types and contents of nutrients. The carbohydrates contained in fruits are mainly sucrose, glucose and fructose, and the content is high, accounting for 5%~20%, which can be absorbed by small intestine after a little digestion. If you eat too much, it will cause the accumulation of sugar, which will quickly turn into fat and cause obesity. The carbohydrates contained in vegetables are mainly polysaccharides and dietary fiber, and most of them are low in content, which is not easy to cause obesity. The contents of vitamins and minerals in vegetables are generally higher than those in fruits.

How will the real estate market go next year? The central authorities revealed these signals.

  Data map. China News Service reporter Wei Liang photo

  BEIJING, Beijing, December 18 (Zhongqing) The Central Economic Work Conference, which officially closed on December 16, put forward a new orientation and work deployment for the real estate market in China. The statement that "houses are used for living, not for speculation" is regarded as weakening the financial attributes of housing. At the same time, the meeting’s deployment in curbing the real estate market bubble, increasing land supply, and implementing the linkage between people and land will also determine the tone and market trend of the property market regulation next year.

  "The house is for living, not for speculation."

  — — In the future, financial funds will be strictly guarded against real estate speculation.

  "The house is for living, not for speculation". When deploying the real estate market in China in 2017, the Central Economic Work Conference took the lead in clarifying this strategic position.

  What is the meaning behind the seemingly easy-to-understand expression? Ni Pengfei, director of the Urban and Competitiveness Research Center of China Academy of Social Sciences, told the reporter of Zhongxin.com (WeChat WeChat official account: cns2012) that the above positioning is intended to weaken the financial attribute. Housing is a durable consumer product, and its basic function is to live, not to invest and speculate to make money.

  Ni Pengfei said that the key to financial supervision in the future is to prevent the stock market, bond market, insurance and bank funds from illegally entering the property market. "The main reason for this round of overheated property market is that financial institutions take advantage of regulatory loopholes and take different forms to let funds detour into the real estate market".

  "The most terrible thing about real estate speculation is not to use its own funds to speculate in real estate, but to use financial funds to speculate in real estate. The participation of financial institutions is the main factor causing high leverage." Niu Fengrui, former director of Urban Development and Environment Research Center of China Academy of Social Sciences and vice president of China Urban Economics Association, said frankly in an interview.

  As a practitioner, Yan Yuejin, research director of the think tank center of Yiju Research Institute, explained that "the policy meaning is very clear, the housing demand should continue to be guaranteed, and the demand for real estate speculation should be controlled and contained".

  In order to ensure the normal demand for housing and loans, the meeting proposed that the currency should be controlled at the macro level, the micro-credit policy should support the reasonable self-occupied housing purchase, and strictly limit the flow of credit to investment speculative housing purchase.

  Data map. China News Service reporter An Yuan photo

  Curb the real estate bubble and prevent ups and downs.

  — — We must adhere to the classification and regulation, and make policies according to the city and the place.

  The meeting called for the comprehensive use of financial, land, fiscal, taxation, investment, legislation and other means to accelerate the study and establishment of basic systems and long-term mechanisms that conform to national conditions and adapt to market rules, so as to curb the real estate bubble and prevent ups and downs.

  "It can be seen that the policy clarifies the overall thinking of real estate regulation next year." Yan Yuejin told reporters that the first is to curb the real estate bubble, mainly the bubble in the land market and housing prices; The second is to prevent the market from ups and downs and make the market more stable, so that it is expected to be more stable. "

  After the real estate bubble is squeezed out, the real relationship between supply and demand is easier to show. Ni Pengfei analyzed that the decision-makers are clearly aware of the positioning of real estate and will never tolerate the proliferation of speculation. If measures are taken to ensure that housing returns to the residential and consumption attributes, it will help the real estate market to squeeze out the bubble and show the real relationship between supply and demand, which is conducive to the healthy and stable development of the real estate market.

  The meeting made it clear that in terms of destocking, it is necessary to adhere to classified regulation and control, and focus on solving the problem of excessive real estate inventory in third-and fourth-tier cities due to local policies. It is necessary to combine destocking with population urbanization, improve the interconnection of infrastructure between third-and fourth-tier cities and megacities, improve the level of public services such as education and medical care in third-and fourth-tier cities, and enhance the attractiveness of agricultural transfer population.

  Data map. China News Agency issued Zhang Hengwei photo

  Implement the policy of linking people with land

  — — First-and second-tier cities may increase land supply indicators.

  The meeting pointed out that it is necessary to implement the policy of linking people with land and allocate construction land indicators according to the population flow. To implement the main responsibility of local governments, cities with high pressure of rising housing prices should reasonably increase land supply, increase the proportion of residential land, and revitalize idle and inefficient land in cities. Megacities should speed up the dismantling of some urban functions and promote the development of surrounding small and medium-sized cities.

  Ni Pengfei believes that it is necessary to treat it differently: the situation in third-and fourth-tier cities is that local governments supply a large amount of land, but because of the large supply, house prices will be low; However, in first-and second-tier cities, due to the subjective and objective functions, the land supply is insufficient, resulting in land hunger and shortage, and the land auction system makes the land price particularly high.

  "The rise in land prices and housing prices caused by insufficient supply in the first-and second-tier land markets can be solved from two levels." Ni Pengfei suggested that, first of all, we should increase the land supply index and adopt the mode of linking people with land; Secondly, because there are more land stocks in first-and second-tier cities, there is also room for revitalization.

  Yan Yuejin said, "The original intention of the policy is to consider the different characteristics of population movements in major cities." It is expected that cities that continue to implement purchase restrictions next year will have more opportunities in obtaining development land and land transfer. The tight supply situation in the property market in the second half of 2017 is expected to change.

  Data map. China News Service reporter Tang Yanjun photo

  Accelerate the legislation of housing rental market

  — — The urban housing structure will be further improved.

  The meeting also pointed out that it is necessary to speed up the legislation of the housing leasing market and accelerate the development of institutionalized and large-scale leasing enterprises. Strengthen the supervision and rectification of the housing market, and standardize the development, sales and intermediary activities.

  In June this year, the General Office of the State Council issued "Several Opinions on Accelerating the Cultivation and Development of the Housing Rental Market", proposing that by 2020, a housing rental market system with diversified suppliers, standardized business services and stable rental relationship will basically be formed, and a public rental housing security system with basic security, fairness and sustainability will basically be formed. In order to speed up the cultivation and development of the housing rental market, real estate development enterprises are encouraged to carry out housing rental business, and commercial buildings are allowed to be converted into rental housing according to regulations.

  In Yan Yuejin’s view, the development of housing rental market is to cater to the rental needs of housing users at all levels in the city; Or from the perspective of further improving the urban housing structure.

Focus! Interpretation of the optimization and adjustment of Beijing passenger car lottery policy

  Xinhua News Agency, Beijing, June 1st Question: Focus! Interpretation of the optimization and adjustment of Beijing passenger car lottery policy

  Xinhua News Agency "Xinhua Viewpoint" reporters Lu Chang, Ding Jing and Xia Zilin

  On June 1st, Beijing issued the Interim Provisions on the Regulation of the Number of Small Passenger Cars in Beijing (revised draft for comments), the detailed rules for the implementation of the Interim Provisions on the Regulation of the Number of Small Passenger Cars in Beijing (revised draft for comments) and the index allocation scheme for the one-time issuance of new energy passenger cars (revised draft for comments). According to the above regulations and plans, the current regulation and control policies for passenger cars in Beijing will be greatly optimized and adjusted.

  What benefits will the adjustment bring? What impact will it have? The "Xinhua Viewpoint" reporter combed.

  Aspect 1: Give priority to "car-free families"

  According to the lottery results of the latest passenger car index in Beijing in April this year, the winning ratio is about 2898:1, and the difficulty has reached a record high. In addition, this year’s 54,200 personal new energy indicators have also been exhausted in the first phase, and new applicants will wait for a long time. "I can’t shake it for a long time" brings inconvenience to many "car-free families".

  According to the new regulation policy of passenger cars, on the basis of participating in the allocation of ordinary indicators and new energy indicators on an individual basis, Beijing has added the allocation of indicators with "car-free families" as the unit and sorting points. At present, applicants who are participating in the allocation of indicators in their own names can form a family or multiple families to apply for indicators with their spouses, children and parents who meet the requirements if they want to switch to applying for indicators on a family basis. Among them, non-Beijing family members are required to hold Beijing residence permit and pay social insurance and personal income tax in Beijing for nearly five years.

  The reporter learned that a "car-free family" needs at least two people, and all members can’t have a passenger car registered in Beijing. Rong Jun, deputy director of the Beijing Municipal Transportation Commission, said that with the deepening of data integration and sharing between the state and different departments such as population, marriage registration and vehicle management in Beijing, the allocation of indicators by family has a technical and data foundation. This policy optimization plan will require family applicants to jointly make a commitment to the authenticity, accuracy and completeness of the information provided, and incorporate the performance of the commitment into the applicant’s personal credit record.

  Aspect 2: The lottery integral rules and quota ratio are all inclined to "car-free families"

  According to the proposed method, the "car-free family" lottery will calculate the total family points according to the points of each family applicant. Family applicant points are composed of basic points and ladder (waiting) points. Among them, the basic score of the main family applicant is 2 points, and the basic score of other family applicants is 1 point per person. According to the new policy, the allocation of indicators gives "car-free families" significantly higher than the winning rate of individual ordinary indicators and the quota number of new energy indicators.

  Take a family of three as an example. The family applicant consists of the principal applicant, the principal applicant’s spouse and a child, with three people in two generations. For example, both husband and wife are lottery (at present, the average step score of individual lottery is 5 points). According to the integral formula, the family score is 54 points, which is 54 times that of the individual who participated in the lottery for the first time and more than 10 times that of the principal applicant.

  According to the new policy, when applying as a family, the more family applicants, the higher the total score of the family and the higher the probability of obtaining the index. In the allocation of new energy indicators, in addition to the quota allocated to units and operating vehicles, 80% of the indicators are first allocated to "car-free families" according to the level of family scores.

  Aspect 3: This year, 20,000 new energy indicators will be issued to "car-free families" at one time.

  According to the proposed measures, Beijing will issue 20,000 new energy minibus indicators at one time, all of which will be allocated to "car-free families". The allocation of one-time additional issuance indicators is planned to be implemented in August this year, and the specific allocation method is consistent with the scheme of allocating new energy passenger cars by family points.

  The relevant measures are clear, and the relevant information of all applicants will be preliminarily reviewed by the relevant departments through data exchange and comparison. The families that pass the preliminary examination are sorted from high to low according to the total score of the family. When the total score is the same, the order of the registration time of the family applicants in the minibus management information system is adjusted as early as possible. The ranking results are publicized on the designated website. The top 20,000 families will be rechecked by the relevant departments, and if they pass the verification, a notice of confirmation of indicators will be issued.

  Cheng Shidong, director of the Urban Transportation Research Center of the Comprehensive Transportation Research Institute of the National Development and Reform Commission, believes that issuing 20,000 new energy indicators to "car-free families" can effectively solve the demand for some family cars, effectively enhance the sense of acquisition, and further stimulate automobile consumption.

  Aspect 4: "One person with more cars" is gradually banned.

  According to the proposed measures, Beijing plans to increase the restrictions on the number of individuals applying for updating indicators. If a person owns more than one passenger car registered in Beijing, he can choose one of them to apply for updating the index when updating the vehicle, and the other vehicles will not be updated, but he is allowed to transfer the redundant vehicles to the spouse, children and parents of the passenger car whose name is not registered in Beijing. The transferee does not need the index certificate but must meet the condition of "individual with domicile in Beijing". In addition, the kinship between the transferee and the vehicle registration owner must last for one year. For the registration of vehicle change between husband and wife and the registration of vehicle transfer for divorce analysis, it is also necessary to meet the condition that the marriage has expired for one year.

  Rong Jun said that the passenger car index is a limited social public resource, and this policy optimization plan proposes that individuals with multiple cars can only apply for an updated index, mainly to further enhance the fairness of the distribution of social public resources. "As a personal property, the vehicle owner can use it until it is scrapped. When it needs to be updated, you can choose one of them to apply for updating indicators."

  It is understood that the index regulation and management department will strengthen the crackdown with the public security, traffic control and judicial departments on the illegal rental and sale of multiple vehicles under one person’s name and the paid transfer of indicators through marriage registration. Once verified, the indicators will be recovered, and those who have purchased vehicles will be blacklisted and will not be updated.

  Aspect 5: The number of annual quota quotas will not be adjusted for the time being.

  The reporter learned that the policy optimization plan is mainly to adjust the allocation method. In principle, the number of annual quota quotas for next year will not be adjusted for the time being. The Beijing Municipal Commission of Communications and other relevant departments said that they will combine the Beijing urban master plan with the "in accordance with ‘ Controlling possession, restricting use and differentiating ’ The principle of the implementation of traffic demand management, by 2035, the proportion of passenger cars and the average travel intensity decreased by not less than 30%.

  Statistics show that at present, the number of registered passenger cars in Beijing is 5.26 million. Cheng Shidong said that in the long run, Beijing still needs to guide the rational use of cars by parking to achieve the goal of "static braking", and should speed up the improvement of public transportation and green travel environment to enhance its attractiveness and competitiveness.

  Rong Jun introduced that in 2019, the proportion of green travel in Beijing reached 74%, and it is expected to increase by another percentage point this year. "It is necessary to improve and optimize the industrial layout and residential layout, and alleviate the traffic congestion problem by promoting the balance between occupation and residence."

  It is reported that relevant units and people from all walks of life can put forward opinions or suggestions on the Interim Provisions on the Regulation and Control of the Number of Passenger Cars in Beijing (Revised Draft for Comment) and the Detailed Rules for the Implementation of the Interim Provisions on the Regulation and Control of the Number of Passenger Cars in Beijing (Revised Draft for Comment) by e-mail and letter before June 30, 2020, and the optimized regulation and control policies will be implemented next year.

In 2018, China recalled 69.25 million cars to save consumers’ losses of 52 billion.

  BEIJING, June 4 (Xinhua) According to the website of the State Administration of Markets, the State Administration of Markets recently issued a notice on the national automobile safety and recall in 2018. The circular pointed out that in 2018, a total of 221 car recalls were implemented, involving 12,512,800 defective vehicles. By the end of 2018, China had carried out a total of 1,768 automobile recalls, involving 69.25 million defective vehicles. The direct cost of automobile product producers due to the recall totaled about 52.9 billion yuan, and the accumulated loss of consumers was 52 billion yuan.

  According to the notice, in 2018, the national automobile product defect information collection system received a total of 24,800 automobile product defect clue reports submitted by consumers. According to the classification of the vehicle assembly to which the defective parts belong, 10664 cases of defects involving the engine assembly were reported, accounting for 60.94%; Followed by 2524 cases of transmission system, accounting for 14.42%; 1091 cases of electrical equipment, accounting for 6.23%; 963 cases of car body, accounting for 5.50%; 675 cases of steering system, accounting for 3.86%; 655 cases of braking system, accounting for 3.74%; 297 cases were suspension system, accounting for 1.70%; 278 cases were tires and wheels, accounting for 1.59%; 244 cases of additional equipment, accounting for 1.39%; There were 108 cases of airbags and seat belts, accounting for 0.62%.

  In 2018, a total of 221 vehicle recalls were carried out, involving 12,512,800 defective vehicles. The number of recalls and the number of recalls decreased by 12% and 37.6% respectively compared with 2017 (the peak in 2017 was caused by Takada airbag recall). By the end of 2018, China had carried out a total of 1,768 automobile recalls, involving 69.25 million defective vehicles. The direct cost of automobile product producers due to the recall totaled about 52.9 billion yuan, and the accumulated loss of consumers was 52 billion yuan. In the past five years, the average number of recalls has been 220 times, and there has been a recall every two days. The implementation of recalls has become a normal activity of automobile manufacturers.

  In terms of the nature of recalls, in 2018, the number of recalls affected by the investigation by the General Administration of Market Supervision was 59, accounting for 27% of the total number of recalls; There are 6,798,700 defective vehicles involved, accounting for 54% of the total number of recalls. Defect investigation is still the main way to find vehicle product defects. By the end of 2018, there were 369 recalls affected by the investigation, involving 39,926,700 defective vehicles, accounting for about 58% of the total recalls.

  From the assembly involved, there were 50 recalls due to airbag/seat belt related defects, involving 1,992,500 vehicles; 44 recalls due to engine-related defects, involving 3.147 million vehicles; 42 recalls due to electronic and electrical defects, involving 1.303 million vehicles; 29 recalls due to some defects in the car body, involving 605,500 vehicles; 20 recalls due to brake/wheel related defects, involving 1,913,700 vehicles; 17 recalls due to steering/suspension related defects, involving 3,467,700 vehicles; 14 recalls due to powertrain related defects, involving 77,400 vehicles; It was recalled five times for other reasons (additional equipment), involving 5923 vehicles.

  From the perspective of defect types, in 2018, it was recalled 9 times due to standard compliance problems, involving 2124 defective vehicles; Non-standard compliance (unreasonable danger) was recalled 212 times, involving 12,510,600 defective vehicles, accounting for 99.98% of the total recall.

  From the reasons of defects, 117 recalls were made due to design problems, involving 9.566 million vehicles; 100 recalls due to manufacturing problems, involving 2.876 million vehicles; Recall twice due to identification problems, involving 3461 vehicles; It was recalled three times for other reasons, involving 69,400 vehicles.

  The circular pointed out that in 2018, the General Administration of Market Supervision focused on the following tasks in promoting the implementation of the automobile recall system and supervising the production enterprises to fulfill their recall obligations: first, strengthening the collection and analysis of defect clues; second, strengthening defect investigation; third, publicizing recall laws and standards; fourth, strengthening the recall supervision of new energy vehicles; fifth, carrying out recall supervision and effect evaluation; and sixth, improving the technical support system for recall supervision.

  The circular also clarified the key tasks in 2019: first, promoting the construction of the automobile recall system; second, improving the recall supervision system; third, consolidating technical support capabilities; fourth, strengthening the research on automobile safety policies; and fifth, increasing the publicity of automobile recalls.