江浙沪品茶论坛

Zhu Yue Wei Mengge Zhongqing Bao Zhongqing Net reporter Sun Haihua

From the orangutans who like to live alone, to the gibbons with white palms, to the langurs with harem, and the cynomolgus monkeys who marry in groups, the primates’ views on marriage and love and the size of their social circle are very different. What kind of driving force has shaped this difference? This question was answered in the study of Asian langur by the team of Northwest University-

In the early morning of June 2nd, Science magazine published the latest research achievement Adaptations to a cold climate promoted social evolution in Asian colobine primates in the form of a long article, which systematically revealed the mystery of primate social evolution for the first time. The cover picture of this issue of Science shows the representative of Asian langur-Qinling golden monkey, and the picture is provided by the research team of Northwest University.

Restore the evolution history of Asian langur social system

"Primates have a complex and diverse social structure. Their social structure has a strong phylogenetic signal, and it has been deeply influenced by historical environmental upheaval and recorded in their genomes. " Qi Xiaoguang, a professor at the School of Life Sciences of Northwest University and co-first author of the paper, said at the press conference on related research results held by Northwest University on June 2.

"We have been focusing on the study of golden monkeys for more than 20 years, using the method of combining GPS collar, satellite remote sensing technology and social network analysis, and through long-term field tracking and observation, we have always wanted to uncover the mystery of primate society." Li Baoguo, a professor at Northwest University and co-correspondent, introduced.

After years of research, the team found that the golden monkey society has a unique four-layer social structure: family, detachment, group and community. In 2014, Qi Xiaoguang and Li Baoguo jointly developed a paper in the journal Nature-Communication, and put forward the hypothesis of "Asian origin-aggregation" for the first time, which broke the single understanding of the complex social origin of primates by western scholars and opened a new avenue for studying the evolution of animal social systems.

This time, the research team extended their eyes to 8 million years ago, and pieced together the diffusion path of Asian langur ancestors from the historical distribution suggested by biological fossils and the excavation of big data such as ancient sea level, ancient geography and ancient climate.

About 8 million years ago in Miocene, the ancestors of Asian langurs spread from Europe.

One of them spread from the Indian Peninsula to Southeast Asia, and this group divided into three genera, and retained the ancestral "single family group" social system of one male and many females.

The other branch spread to Yunnan, China in the late Miocene, and formed the base group of strange-nosed monkeys. With the cold events in the late Miocene in this area, their family groups were no longer mutually exclusive, and sometimes separated and sometimes aggregated, forming a heavy-class society.

Due to the lack of food, most of the strange-nosed monkeys later spread to the south and evolved into different species such as white-rumped langurs and proboscis monkeys. Today, although they live in warm areas of Viet Nam and kalimantan island, they still retain the structural feature of a class-heavy society.

At the same time, the golden monkey, a close relative who stayed in the north of China, drew closer social relations, cultivated long-term and stable ties between families, and evolved a real stratified society in the repeated glacial and interglacial cold events in the Pleistocene.

"We found that species living in cold environments tend to form larger communities, and two social aggregations occurred in the Late Miocene Cold Period and the Pleistocene Quaternary Ice Age, respectively, which indicates that cold events may have driven community aggregation." Qi Xiaoguang said that on this basis, the team put forward the social evolution history of the Asian langur "three acts". This discovery is also a systematic exposition of the hypothesis of "Asian origin-aggregation" put forward by the team.　

Why did you choose the Asian langur as the research object? Scientists have also given the best answer: Asian langur belongs to the Old World Macaca colobus subfamily, with a total of 55 species in seven genera, including four different social system types: monogamous society, polygamous society, stratified society and quasi-stratified society, which are distributed from tropical rain forest to temperate snow-capped mountains. The team believes that this group is a good model for studying the social evolution mechanism system of primates.

In order to do this research well, the team cooperated with universities, research institutes, zoos and other teams at home and abroad to analyze and investigate 2903 habitats of Asian langur, and analyzed the comprehensive ecological factors of 19 environmental variables extracted from each habitat, thus constructing the most comprehensive Asian ecological data set so far.

Establish a research framework of "behavior-ecology-genome"

In the long history of 8 million years, how did the repeated cold events drive the Asian langur to complete the community gathering? This needs to be confirmed by analyzing the genome data passed down from generation to generation.

In order to answer the questions, the team creatively established a brand-new research paradigm of "behavior-ecology-genome". They overcame many difficulties such as cross-discipline and cross-region, completed high-quality genome sequencing of seven representative species of Asian langur, and obtained the world’s first non-human primate genome at chromosome level, thus constructing accurate phylogenetic relationships.

"We combine the central principles of macroevolution’s biology and micro-molecular biology to explore the genetic mechanism behind the cold events driving community aggregation." Qi Xiaoguang said. Through comparative genomics and phylogenetic analysis, it is shown that the cold events in history have promoted the positive selection of energy metabolism and neurohormonal regulation-related genes in Asian langur, and evolved a more effective brain, neurohormonal regulation network. Among them, the gene changes related to oxytocin and dopamine transmitter system in the strange-nosed monkey group are particularly striking: the society of its group presents a two-step step polymerization model, from "polygamy" of its ancestors to the formation of separation.

The team found that in mammals, oxytocin and dopamine can strengthen the bond between mother and child. The cold effect triggered their adaptive changes, strengthened the bond between mother and baby, and prolonged the parental rearing of the strange-nosed monkeys in cold areas. At the same time, the friendly behavior between individuals has also been promoted, which has further promoted the gathering of single family groups to a heavy society. This result has also been verified by cell function experiments and behavioral experiments.

"For example, our Qinling golden monkeys, where the climate is cold and food is scarce, will have more behaviors of holding groups to keep warm and grooming each other. Such a neuromodulation mechanism also indirectly increases the individual’s friendly behavior and tolerance, thus promoting the gathering of family groups to a heavy society. " Qi Xiaoguang said.

This study integrates animal behavior, ecology, geology, comparative genomics and other multidisciplinary means, and completely reveals the evolution process, motivation and genetic basis of the complex social system of Asian langur. Its greater significance lies in the establishment of a new research paradigm of "behavior-ecology-genome", which provides a new way to understand the origin and evolution mechanism of primate social behavior, including human beings, and also opens up a new direction for the development of animal behavior.

As the reviewer of Science magazine commented: "The author has traced back the social evolution history of Asian langur completely through multidisciplinary methods, and comprehensively analyzed its ecological causes and genetic basis, which is unprecedented in the study of primates and vertebrates, and has opened up a new avenue for the field of social evolution."　

Stick to the original heart: "If you like it, you want to protect it."

It is Qi Xiaoguang’s greatest wish for many years to make such a beautiful Qinling golden monkey on the cover of Science for the whole world to see. In 1999, he joined the golden monkey research team of Northwest University, studied under Professor Li Baoguo, and became one of the pioneers in the field research of Qinling Golden Monkey.

"The first time I saw the golden monkey was during the winter vacation of my freshman year." After walking alone for 12 hours, Qi Xiaoguang finally saw them in the depths of the Qinling Mountains: "Wow, they jumped over my head-light yellow hair, light blue skin, pure eyes … so beautiful!" "If you like it, you want to protect it" has become his initial intention to study the golden monkey for more than 20 years.

In his early years, Qi Xiaoguang spent six or seven months every year in the Qinling Golden Monkey Base, crossing the mountains and sleeping around the clock, carefully observing every subtle movement of the Golden Monkey, and spared no effort to collect data and analyze the research results. It is also because they are stationed in the field base all the year round that they explore a set of methods suitable for the study of mountain primate behavior, which lays a key foundation for the follow-up research.

"In the past, the research on the evolution mechanism of primate social systems has always stayed at a purely macro level, lacking in-depth exploration of molecular mechanisms. It is precisely because of the lack of suitable research templates and genome-wide data that there has been no major breakthrough in its specific evolutionary mechanism, especially its genetic basis. " After consulting a number of experts in the animal field, Qi Xiaoguang and team experts began a lonely attempt. Trying to try and make mistakes again and again, overthrowing and reorganizing again and again … It was this time that led Wu Jinwei and Zhao Lan to explore together, which made Qi Xiaoguang unforgettable.

Finally, the team finally found a clue to break through the bottleneck in micro-molecular biology. In the face of an extremely huge, complicated and completely unfamiliar new field, the team is quietly making breakthroughs. "The artificial classification of disciplines makes us only see one side, but biological evolution itself will not be inevitable because of these artificial classifications, which also forces us to look at the process and practice of evolution with a comprehensive eye." Zhao Lan said.

On the campus of Northwest University, Qi Xiaoguang often communicates with the teachers and students of the team of Shu Degan academicians who studied CAMBRIAN fossils 500 million years ago. Although their research period spans hundreds of millions of years, it involves many dimensions, such as behavior, ecology, geology, fossils and heredity. As long as there is an intersection, he will be interested.

"In the future, we will continue to deepen the research on the evolution mechanism of primate social systems represented by Asian langurs, and then explore the origin and changes of early human society." Qi Xiaoguang is full of expectations.

Nowadays, there are many kinds of cars, and all kinds of models are dazzling. At this time, we should proceed according to our own reality, and the right one is the best. For example, this car is often mentioned as a space problem. So whether this car is a mule or a horse, let’s take a look at its actual performance.

First of all, from the appearance, the front face of Yidong looks very simple, equipped with a spindle grille, which makes people unforgettable. Coupled with headlights, the overall look is deep. The car is equipped with LED daytime running lights, automatic opening and closing, delayed closing and so on. Coming to the side of the car body, the size of the car body is 4770MM*1840MM*1440MM, and the car adopts the lines with flamboyant personality, which gives people a very eye-catching feeling. With large-sized thick-walled tires, smooth lines run through the whole side of the car. In the rear design, the rear looks very sharp, the taillights look very cold, and the overall layout is impressive.

Sitting in the car, the interior style is very unique, and the overall design atmosphere is still in place. The steering wheel of the car uses a three-spoke design and is made of imitation leather, which gives a good grip experience. Let’s take a look at the central control. The design of the center console is reasonable, which makes the interior design quite layered and has a certain sense of technology. The dashboard and seats are equally eye-catching. The dashboard of the car presents a young design style, and the trendy design elements make people remember it at a glance. The car adopts leather-like seats, which are wide and thick, further improving the comfort of drivers and passengers.

The escape-matched wet dual clutch (DCT) gearbox has a maximum power of 125KW and a maximum torque of 260N.m, and the power performance is good.

The space of the escape trunk is quite satisfactory. If some large objects need to be installed, the rear seats also support proportional reclining, which is enough for home use. In addition, the car is equipped with anti-lock braking (ABS), LED daytime running lights, brake assist (EBA/BAS, etc.), braking force distribution (EBD), traction control (ASR/TCS, etc.), main driving airbag, co-pilot airbag, side airbag curtain, front side airbag and other safety configurations.

I wonder if you are excited about this car introduced today? If you like this car, don’t hurry to learn more about it!

Original title: Beauty cried! The figure is not surprised to cross the gull, and the gull flies to find a fairyland.

Source: jiaodong online.

Original title: Beauty cried! The figure is not surprised to cross the gull, and the gull flies to find a fairyland.

Source: jiaodong online.

Jiaodong online, March 18 (Reporter Jia Chuhang, intern Wang Yumeng) In March, the weather gradually warmed up, and a group of special residents of the sea came down from Yantai Mountain. They flew in the blue sky and shuttled through the green sea, adding a different kind of vitality and vitality to the city. Many tourists come here to experience the joy of being in close contact with seagulls on the shore.

The wild spring water is brighter than the mirror, and the figure is not surprised to cross the gull.

Seagulls in the morning light, bathed in sunshine, spread their wings and fly, picturesque, making people relaxed and happy. Many tourists not only like to face the sea, watch the clouds rolling and the seagulls flying, but also prefer to feed the seagulls and take photos with them at close range.

Flitting, flitting, what am I like, but a sand-snipe in the wide, wide world!.

A flock of seagulls soar freely in the blue sea. They have a gray and shiny feather, a pair of powerful wings waving gently in the sea breeze, as if to break all the shackles and fly to the end of the sky. Their eyes are firm and bright, as if to announce its freedom and fearlessness to the world.

Go to the church and visit the swallow, and make a blind date with the gull in the water.

When the seagull flies over the rough sea, it seems to be incarnated as the spirit of the sea, breathing and dancing together with the sea. Its wings across a beautiful arc in the sea breeze, as if telling its admiration and love for the sea. When it stops on the reef, it looks so quiet and peaceful, as if listening to the call of the sea and feeling the breath of the sea.

Fight for crossing, fight for crossing, and start a pool of gulls and herons.

Seagulls are one of the important predators in the marine ecosystem. They feed on fish, shrimp and plankton, and play a vital role in the marine ecological balance. As one of the representative animals in Yantai, seagulls add unique landscape charm to the city and attract many tourists to watch it. At the same time, seagull is an important species on the migration route, which is of great significance to the study of global climate change and species migration.

Why do seagulls like to come to Yantai

Yantai, located in the east of Shandong Peninsula, is a coastal city with rich tourism resources and profound cultural heritage. There are four distinct seasons, pleasant climate and superior marine environment, which provide an ideal habitat for seagulls. Yantai has a long coastline, and natural landscapes such as beaches, reefs and islands provide seagulls with rich food sources and diverse living environments.

This spring, welcome to Yantai to see seagulls, and watch these elegant spirits soar freely between the blue sky and the blue sea!

accelerate brake fuel consumption second rice liter Measured fuel consumption 4.3L test FAW Toyota Corolla Dual Engine Review Editor – Zhang Ke:

We are already very familiar with the hybrid system, the driving experience is relatively smooth, and driving in urban areas is very fuel-efficient. In fact, the biggest highlight is the price. This is the first time the hybrid system has been produced in a country other than Japan, and the cost is greatly reduced, making the hybrid model not too expensive than the conventional power model, and it is easier to get back the cost! If you often drive in urban areas, it is recommended to buy

Review Editor – Li Jia:

The sales of the gasoline version of the Corolla are already quite eye-catching at this level, so I am not worried about the market performance of the Corolla Dual Engine, because it is only a little more expensive than the ordinary gasoline version of the Corolla, but it is definitely a high-value, low-cost Corolla. If you don’t pay attention to the power flow diagram on the dashboard during daily driving, you can basically drive it as an ordinary gasoline version of the Corolla.

Review Editor -:

As a family car that focuses on economy, the performance of the Corolla Duo Engine is very satisfactory. Although the power is not outstanding, it can also meet the needs of urban transportation. The key point is the super economy, which makes people impeccable. Overall performance, I think it is not too much for the Corolla Duo Engine to get nine points. But unfortunately, in most areas, the Corolla Duo Engine is not included in the scope of subsidies for new energy vehicles, which is quite a pity, because the Duo Engine power does not need to rely on charging piles, it only needs to be refueled, and it has the advantages of more fuel-efficient traffic congestion, and the technology is mature. It can only be said that it is a bit "born at the wrong time".

Welcome to Autohome Shanghai Promotions Channel to bring you the latest car information. At present, high-profile models are undergoing large-scale promotions, and car buyers in Shanghai will have the opportunity to enjoy a cash discount of up to 30,000 yuan. The minimum selling price of this luxury sedan has been adjusted to 199,800 yuan, which undoubtedly provides consumers with an excellent opportunity to buy a car. If you are interested in Hongqi EH7, don’t miss this rare opportunity. Click "Check Car Price" in the quotation form now, and contact the dealer as soon as possible to get more specific preferential policies and higher discounts to start your distinguished driving experience.

As a luxury business car, the Hongqi EH7 shows the side design of elegance and power. The body size is 4980mm*1915mm*1490mm, and the wheelbase is up to 3000mm, ensuring a spacious interior space and a comfortable ride experience. The precise layout of the front wheelbase of 1645mm and the rear wheelbase of 1655mm gives the vehicle excellent stability. The tire size is 245/50 R18, and it is paired with a streamlined wheel design, which not only provides good grip, but also adds a sense of mobility and fashion to the vehicle. Overall, the side lines of the Hongqi EH7 are smooth and full of power, highlighting its extraordinary identity and taste.

In terms of interior design, Hongqi EH7 adheres to the concept of both luxury and technology. The car is wrapped in exquisite leather to create an elegant and comfortable atmosphere. The steering wheel is made of advanced leather to provide a good grip, and supports manual up, down, and front and rear adjustment to ensure that the driver can easily find the ideal position. A large 15.5-inch central control screen stands in front, equipped with an advanced automatic speech recognition control system, which can easily control functions such as multimedia, navigation, telephone and air conditioning, showing the intelligent side of technology.

In the seat part, the Hongqi EH7 is made of imitation leather and leather/flip material, which is not only comfortable to the touch, but also has good air permeability. The main driver’s seat has four-way adjustment, including front and rear, backrest, high and low and waist support, providing comprehensive comfort support. The passenger seat also supports multi-directional adjustment to ensure passenger comfort. The front seat is also equipped with heating and ventilation functions, as well as headrest speakers, so the driver can enjoy a high-quality ride experience. In addition, the driver’s seat is also equipped with a power seat memory function, reflecting the thoughtfulness of user requests.

In terms of practical configuration, the car is equipped with two USB and Type-C ports in the front and rear rows to meet the charging needs of passengers. The front row is even equipped with a wireless charging function for mobile phones, highlighting the intelligent and user-friendly design of the Hongqi EH7. The rear seats support proportional reclining, providing passengers with flexible loading space to meet the travel needs of different occasions in an all-round way.

The Hongqi EH7 is equipped with a powerful engine with a maximum power of 253 kW, providing the driver with abundant power support. At the same time, the maximum torque of the engine is 450 Nm, ensuring that the vehicle can maintain good acceleration and responsiveness in all road conditions. The excellent performance of this engine undoubtedly enhances the overall driving experience of the Hongqi EH7.

In short, as the owner of Autohome said, the Hongqi EH7 has successfully captured the hearts of consumers with its unique design and exquisite craftsmanship. Whether it is the aesthetic pursuit of the appearance or the use of technology in the details, it shows the deep understanding and persistent pursuit of the Hongqi brand for high-end luxury cars. This car undoubtedly finds the best balance between luxury and innovation, bringing users a driving experience that exceeds expectations.

Recently, Huawei announced that it and Changan Automobile signed an "Investment Cooperation Memorandum" in Shenzhen on the 25th. Huawei will separate the car BU business and establish a new company, and related parties will intend to invest in the company and work with Huawei to support the company’s future development. According to industry analysts, Avita may be the biggest beneficiary of this cooperation.

At present, all new cars under Avita are equipped with the Hongmeng cockpit developed based on HarmonyOS 4, and are equipped with the far-leading Huawei high-end intelligent driving system HUAWEI ADS 2.0, which brings together the top technological achievements of Huawei’s car BU. After Huawei’s car BU business is operated independently and the new company is established, its core technologies related to smart car solutions, including intelligent driving, Hongmeng cockpit, etc., will be independent in the new company. And Changan and its affiliates, as the only car company in the independent company, account for nearly 40% of the shares, and have full say. It is also reasonable to give Avita the latest technology of the car BU independent company first in the future.

Taking Avita 12 as an example, it has been on the market for a week, and it has harvested 15,000 and is about to be delivered. Of course, behind the excellent sales results of Avita 12, Huawei’s intelligent strength has played a strong empowering role. For example, with the blessing of Hongmeng cockpit developed based on HarmonyOS 4, Avita 12 has the function of "scene world", which provides different scene modes based on scenes such as rest, car wash, pets, etc. Moreover, the Avita 12 car system has the intelligent voice function of smooth communication like a real person, and the owner can achieve the functions he wants through voice dialogue.

Huawei’s advanced intelligent driving system HUAWEI ADS 2.0 also plays an excellent empowering role in Avita 12. With the blessing of such a top-level intelligent driving system and the AVATRUST sensory system, it can accurately understand road conditions and realize intelligent assisted driving in urban areas, high-speed and other scenarios. For novice drivers, the auxiliary parking function of Huawei’s advanced intelligent driving system is very friendly, supporting more than 160 types of parking spaces. Assisted parking.

The outstanding performance of Avita 12 after its launch has given Huawei the confidence to cooperate with Changan Automobile to a certain extent. Yu Chengdong, CEO of Huawei Smart Car Solutions BU, once introduced the practical application performance of its various intelligent technologies at the launch conference of Avita 12. At the Guangzhou Auto Show, Yu Chengdong praised Avita 12 even more, saying that it is the most beautiful, intelligent and technologically advanced car.

After the joint establishment of the new company by Changan Automobile and Huawei, it will further increase the technical tilt of Avita and subsequent models, empower its models with top intelligent technology, and further enhance the market competitiveness of Avita.

foreword

"Green wave belt is a concept that has existed in the transportation industry for a long time. Daily interaction relies on its long-term technical accumulation in big data and artificial intelligence. By fusing and calculating its own data, traffic control department data and third-party data, it integrates cycle time, surrounding scenes, road traffic direction, driving speed and other factors. The algorithm is used to calculate the best signal and control parameters, quickly form an urban green wave scheme, and can be dynamically adjusted according to the real-time traffic flow and road conditions on the road. In the case of having as little impact on the surrounding traffic as possible and making maximum use of the existing transportation infrastructure, the complexity of green wave signal control coordination and optimization is greatly reduced, allowing the traffic control department to dispatch and manage the traffic flow of the road network with a click of the mouse, so that "Photoshop" can be turned into "Meitu Xiuxiu" in seconds. At the same time, it helps the urban traffic control department to build a digital traffic management system at a very low cost, and quickly improves the fine and intelligent water of urban road traffic signal control. Realize "100 times efficiency" with "100% rate", help the construction of a transportation power, and create a safe, orderly, smooth and civilized road traffic environment for the masses to travel. "

Special thanks to the Hangzhou traffic police. Hangzhou is the first city where our number of smart green waves have landed. It is also under the trust and professional guidance of the Hangzhou traffic police that we have really polished this product and continuously optimized it. Since October last year, we have co-created and strengthened the construction of green wave belts with the traffic police brigades of Hangzhou districts, changing the original mode of setting up long-distance green wave belts, turning 3-5 intersections into a group, turning lines into faces, and increasing the speed by about 20%. At present, there are more than 200 green wave belts built in Hangzhou, with a mileage of more than 300 kilometers, all over the urban area of Hangzhou. In their daily travel, Hangzhou citizens have unknowingly enjoyed the smooth convenience brought by the green wave belt.

Yesterday, Fang Yi, founder and CEO of Daily Interactive, accepted Love’s analysis and systematically shared his views and successful practices on urban traffic congestion management.

Fang Yi

Founder and CEO of Daily Interactive

Outstanding graduate of Zhu Kezhen College of Zhejiang University. Winner of the 4th "Youth May 4th Medal" and winner of the 10th "Youth Entrepreneurship Award".

The current executive committee of the All-China Federation of Industry and Commerce, the National Association for Science and Technology, the National Youth Federation, the Vice of Young Entrepreneurs, the National Information Security Standardization Technology Association, the Vice of Zhejiang Youth Federation, the Vice of Zhejiang Federation of Industry and Commerce (Provincial Chamber of Commerce), the Vice of Zhejiang Chamber of Commerce, the Vice of Hangzhou Federation of Industry and Commerce, and the Hangzhou CPPCC. The founded Daily Interactive successfully landed in the growth enterprises market in 2019 (code: 300766), becoming the first data intelligence enterprise in China to list on class A shares.

01 Urban traffic congestion management is the world’s most prominent problem in urban diseases, and daily interactions seek new breakthroughs in solutions

Love Analysis: Big report, we need to speed up the construction of a transportation power and figures, and improve urban water governance. Traffic congestion, as the most prominent and most global problem in "urban diseases", is very realistic and challenging to manage. At present, what are the common painpoints in the traffic control department in optimizing urban road condition management and serving citizens’ travel?

Fang Yi: Big, to accelerate the construction of a transportation power and digital, the Ministry of Transport and the Ministry of Science and Technology have also jointly issued the "Opinions on Accelerating the Construction of a Transportation Power Driven by Scientific and Technological Innovation" and the Outline of the Medium and Long-term Development Plan for Scientific and Technological Innovation in the Transportation Field (2021-2035). The development of the strategy and related policies has provided a good policy environment for the development of our data intelligence field and pointed out the development direction.

During the "14th Five-Year Plan" period, our country’s economy will transition to high-quality development, and the volume of passenger and freight transportation will continue to grow. The main problems facing transportation governance are poor traffic flow in the core areas of cities and insufficient smart transportation coordination. According to official statistics, the number of cars in 70 cities in our country has exceeded 1 million. Traffic congestion is the most common, most frequent, most prominent and most world-wide problem in urban diseases, and its governance is very realistic and challenging. According to field observations and industry exchanges, we found that the current traffic control departments generally have the following pain points in optimizing urban road condition management and serving citizens’ travel:

First of all, the number of urban cars in our country, the number of drivers surged, the urban population continues to increase, traffic facilities gradually complex, but the city’s intersections, road sections of the digital construction is still not high, the lack of intelligent traffic coordination, data sharing system has not yet formed, resulting in the city’s overall road conditions online monitoring and analysis is difficult, single point intersection timing intelligent low, many intersections often empty or congestion phenomenon.

At the same time, traffic control departments are mostly based on manual experience, lack of big data support, and the effect of intersection signal timing after manual adjustment cannot be quickly and accurately verified. Closed-loop iterative optimization is difficult to achieve, and there is a lack of sufficient coordination between different intersections and regions. It is difficult to cope with the complex traffic conditions that change in real time throughout the region. Unreasonable single-point green signal ratio settings will have a significant impact on the traffic efficiency of intersections.

At present, many cities commonly use Australia’s SCATS (Sydney Coordinated Adaptive Traffic System) and Europe’s SCOOT (Split Cycle Offset Optimizing Technique) system, its timing capabilities, adaptive capabilities, although very powerful, but data collection through urban roads coil or geomagnetic induction to achieve, its ground sensing equipment is often due to urban road planning adjustment, perennial traffic flow and frequent damage failure, and SCATS and SCOOT system is not "intelligent", timing personnel need "code level" ability, through the input of complex code scripts for timing, the use of high threshold, and the system for traffic police repeated temporary adjustment without "memory ability", it is difficult to precipitate experience, the formation of "reuse", can not flexibly respond to the ever-changing urban traffic conditions.

Finally, the investment in transportation infrastructure in various cities is huge, with hundreds of thousands of intersections at every turn. It is difficult to get through the data of different suppliers. The cost of "one game of chess" transportation intelligence in the entire city and region is high, and the hardware investment is large and the effectiveness is small.

In view of the above situation and pain points, Daily Interactive hopes to use cutting-edge technologies to assist in the innovation of traffic management concepts, management methods, and management models, and to improve the modernization, informatization, and intelligent water of traffic governance. This year, Daily Interactive has created a "Digital Smart Green Wave" product (hereinafter referred to as "Digital Smart Green Wave") for the field of smart transportation. This product can help the traffic police department to efficiently complete the intelligent timing of signal lights and the intelligent coordination and optimization of green wave routes, and realize the digital construction and intelligent scheduling management of road network traffic flow, better serve citizens’ travel, and improve the traffic management water in various cities.

In early 2022, Wenzhou City, Zhejiang Province plans to build (Wenzhou) Data Intelligence and Security Service Innovation Park (ie "Shu’an Port"). Daily Interactive has been deeply involved in it in the early days. When Shu’an Port is completed and operated, "Smart Transportation" happens to be released as Scenario 001. We hope that by relying on the establishment of Shu’an Port, we can make full use of our massive and vivid mobile Internet big data and capabilities, and deeply integrate multi-party dynamic data from traffic management departments, map service providers, and third-party data intelligence service providers for joint calculation, build a localized business system, and provide traffic management tools for traffic control departments to carry out intelligent application in the field of smart transportation.

Love Analysis: Compared with the traffic lights and manually coordinated green wave belt solutions of the traditional timing scheme, what innovations and breakthroughs have been made in solving the above pain points of the traffic control department by the "digital intelligence green wave" advocated by Daily Interactive?

Fang Yi: The so-called green wave belt is not a new concept, but a concept that has existed in the field of transportation for a long time. It refers to the fact that on a designated traffic line, when a vehicle travels at a specified speed, the signal controller adjusts the green light start time of each intersection that the traffic flow passes through according to the distance of the road section, so as to ensure that when the traffic reaches each intersection, it just encounters the "green light", thereby improving the overall traffic efficiency of the traffic line.

Our "digital intelligence green wave" product will use big data intelligent means to analyze the comprehensive traffic flow at intersections, optimize the single-point green signal ratio, improve the utilization efficiency of intersections under large traffic flow, and screen out the traffic arterial intersections suitable for the construction of green wave belts. By considering factors such as cycle time, surrounding scenes, road traffic direction, and driving speed, the algorithm is used to calculate the best signal and control parameters, increase the green wave coordination control, and ensure the smooth passage of vehicles on regional arterial roads by accurately segmenting the timing of intersection signals, thereby reducing delays and stopping times, and achieving the goal of "stop at most once".

The biggest feature of the daily interactive "Digital Intelligence Green Wave" product is to connect and connect the data layer, and conduct data mining and analysis of traffic scenes such as traffic flow distribution, signal control characteristics, intersections and road characteristics, providing traffic distribution, green wave recommendation, green wave optimization and other service components, and then support specific operations such as intersection/road network visualization configuration and intersection coordination relationship research and judgment in specific traffic management applications, so as to achieve "data characterization, feature serviceization, and service application", allowing urban traffic control departments to analyze, respond to, and monitor road conditions in real time, especially for traffic police to quickly and dynamically adjust the timing of intersection lights under their jurisdiction according to real-time road conditions.

Compared with the traditional timing scheme, the "digital intelligence green wave" product can be quickly optimized according to the traffic flow data of the road surface, rather than the "fixed" scheme under the traditional timing, which is more practical and flexible; compared with the manually coordinated green wave scheme, the "digital intelligence green wave" product is supported by traffic flow data and intelligent algorithms, reducing the heavy dependence on expert experience, and the operation is simpler. There is no need for the front-line traffic police to master complex codes. After only one hour of simple training, the front-line traffic police can master the system proficiently, and can realize the one-click configuration of the green wave scheme. It can also be used to fine-tune single intersections and road sections by dragging and dragging. At the same time, digital intelligence green wave can be based on the overall coordination and control of the entire region to avoid the overall inefficiency of regional traffic caused by the lack of systematic thinking and local optimization of various intersections and road sections.

02 Daily interactive "Digital Intelligence Green Wave" products help urban transportation upgrade from "manual transmission" to "automatic transmission"

Love Analysis: What is the general working principle of the "Digital Intelligence Green Wave" product? During this process, what core resources and technical capabilities have been mobilized by Daily Interaction to ensure the intelligence, efficiency and safety of the "Digital Intelligence Green Wave" product?

Fang Yi: Our "Digital Intelligence Green Wave" product, combined with Internet big data, provides personalized green wave signal control solutions in time periods, and conducts regular monitoring of green wave road sections, and makes decision-making and timing for green wave solutions that meet requirements, so as to realize the digitalization of road network traffic flow and intelligent scheduling management. Specifically, it can be understood from the following aspects:

Figure: Schematic of the solution architecture of the daily interactive "digital intelligence green wave"

Our "Digital Intelligence Green Wave" product uses big data joint computing as the underlying infrastructure to maximize the security of data flow computing. This is because, although the massive data of daily interaction is given to the system at the statistical level under the green scene, which fully complies with the requirements of the Personal Information Protection Law, Data Security Law and other relevant regulations, it also needs to integrate the data of the traffic control department and even third parties. Therefore, it needs to enter the private network through the border and integrate the data in the private network for computing to provide services for upper-level applications. In order to ensure product and data security, all the data are put on the state-owned big data joint calculation for joint calculation, to ensure that the original data source can enter and exit, can be counted and not recognized, can not be used, the algorithm is transparent and easy to supervise, and the calculation is safe and efficient.

In terms of basic capabilities, Digital Intelligence Green Wave connects with rich data sources, and uses a powerful system inside Daily Interactive – "DiOS Data Intelligent Operating System" for data governance and fusion calculation, generating signal control scheme suggestions. We use our own big data to perceive real-time traffic flow data on the road, and at the same time, under the coordination of the traffic control department, we will also access the traffic control department’s road network basic data (such as traffic lights, lane lines, etc.), traffic police business data, infrastructure sensing data, etc. for fusion calculation and cross-validation. In the future, it may even be integrated with more third-party maps and data from travel service providers, so that the traffic control department can make a more three-dimensional judgment on traffic flow and road conditions. So how do we manage and calculate so many sources of complex data? This requires the use of the DiOS data intelligent operating system. DiOS can fully mobilize the company’s core capabilities in digital modeling, security computing, visual intelligence, intelligent transportation, etc., perform fusion calculations on the basis of data governance of all parties, and "scene" all kinds of traffic data. It is used to analyze and mine the traffic flow characteristics and travel OD characteristics of various intersections, road sections, and regions, so as to generate corresponding signal control scheme suggestions, and provide simulation components to facilitate the simulation and prediction of the effects of different signal control schemes.

In terms of business applications and empower, our digital intelligence green wave is connected with SCATS and other systems through API and RPA, so as to carry out real-time transmission and execution of signal control solutions and support automatic delivery. At the same time, based on the regional and road network traffic characteristic data, the daily interaction provides functional modules such as road network housekeeper, signal control optimization, green wave, cockpit, operation monitoring, etc., which can perceive, analyze, and dynamically adjust and optimize the information control measures of the road network. Based on the above functional modules, the urban traffic control department can easily implement three-dimensional business applications such as macro-urban planning suggestions to mid-scale road network construction guidance and digital intelligence green wave services through self-filtering maps, green wave design, program delivery, effect prediction and optimization.

It is worth mentioning that the digital intelligence green wave can also carry out the overall coordination and system optimization of regional traffic in a "game of chess" style. In order to avoid the green wave belt in a certain direction destroying the traffic efficiency of the road crossing it, when the horizontal road is made into a green wave belt, our "digital intelligence green wave" product supports a traffic light intersection as the center, and all intersections in the area are aligned with it, so that the intersecting routes and directions can be matched into green wave belts to carry out the overall optimization of regional traffic "game of chess". Of course, traffic is impermanent, and traffic flow is constantly changing in real time. Therefore, the digital intelligence green wave must have the ability to respond to emergencies and continuously iterate and optimize. In the actual traffic management process, it is not realistic to pursue green lights at all intersections. Here, the traffic control department needs to make value judgments. In order to prevent the situation of "snakehead biting snake tail", Digital Intelligence Green Wave also supports "temporary solutions". Once a temporary emergency such as a traffic accident occurs at an intersection or road section, the signal light control can be quickly restored to the original state. When the temporary emergency is over, it can be restored to the green wave state, thereby eliminating traffic pressure. In addition, Digital Intelligence Green Wave can also use technologies such as short-term flow forecasting and variable lanes to make intelligent iterations of the green wave solution and build a closed-loop urban traffic management business.

Finally, it comes to the specific use level. One of the major advantages of our digital intelligence green wave products is the ease of use. The horizontal axis is a road, and the vertical axis is the time axis. When the left signal light phase is selected, the right signal light phase can be automatically aligned with one button. Through this relative alignment, the regional green wave band scheme can be quickly realized. With the assistance of the machine, the difficult "photoshop" can be changed into "Meitu Xiuxiu" in seconds, which greatly reduces the complexity of green wave signal control coordination and optimization, allowing the traffic control department to dispatch and manage road network traffic flow with a click of the mouse.

Love Analysis: What are the core values of "Digital Intelligence Green Wave" products for urban traffic management and people’s livelihood? What kind of cities and road sections are they mainly suitable for?

Fang Yi: From the working principle above, you can see that our "Digital Intelligence Green Wave" product is based on the Internet-side big data fusion calculation, and builds urban green wave belts at a very low cost to help urban traffic control departments build digital traffic management systems, perceive and analyze road profiles in real time, and provide rational construction suggestions to quickly improve the fine and intelligent control of urban road traffic signals, creating a safe, orderly, smooth and civilized road traffic environment for the masses to travel.

It is worth mentioning that our "Digital Intelligence Green Wave" product does not waste any sensors, but makes maximum use of the existing existing facilities and aggregates the data together to achieve "cross-domain data fusion" to provide mutual verification for the urban traffic control department. For example, in case of some extreme situations, the daily interactive traffic flow data changes rapidly, and the traffic control department can use its own data to calibrate the daily interactive traffic flow data; similarly, the daily interaction can also infer the unreasonable traffic facilities data of the traffic control department, and then complete it.

Figure: The main advantages of the daily interactive "Digital Intelligence Green Wave" product

From the perspective of the scope of application, as long as it is a road section that has realized online control, it has the application basis of "digital intelligent green wave". At the same time, the daily interactive "digital intelligent green wave" product has its own set of metrics, such as the repetition rate of the number of vehicles entering a certain intersection and leaving the intersection, etc. We will make a comprehensive judgment based on the location of the road section and surrounding facilities. For example, we find that a road section is equivalent to a tunnel, and the repetition rate of cars entering and leaving is very high. Then we consider this road section to be a commuter road and suitable for green wave belts.

Love Analysis: It is understood that the daily interactive "Digital Intelligent Green Wave" products have been launched in Hangzhou, Wenzhou, Huzhou and other cities, and have received good feedback. So, can you systematically introduce the company’s construction ideas when helping urban traffic control departments implement the "Digital Intelligent Green Wave" project?

Fang Yi: From a physical perspective, the construction ideas of our Digital Intelligence Green Wave project can be divided into the following steps to achieve a closed loop from concept communication, diagnosis, design planning to scheme optimization and solidification.

The first is the concept submission. We will first throw out our understanding of urban traffic management, fully discuss with the traffic control department, and promote the two sides to reach an agreement on the concept; then, we will clarify the daily interaction based on the underlying data to empower the front-end business with intelligent algorithms, emphasizing the traffic control department, especially the front-line traffic police as the user experience, from the traditional industrial control field thinking mode to the Internet-oriented C-end thinking mode, improve the ease of use of the front end, and do not need to change any of the original urban traffic construction plan, which can be completed at a very low cost.

The second step is to start planning and design. The daily interactive "Digital Intelligence Green Wave" product uses the data of mobile Internet big data, traffic police departments and map service providers to automatically jointly calculate and generate roads suitable for green wave construction in cities, and supports manual intervention of recommended green wave road sections, which can be added, deleted and modified according to the actual situation. For example, in the Hangzhou Green Wave Belt project, we found more than 700 kilometers of roads suitable for green wave construction in Hangzhou based on our own measurement standards, and submitted their distribution map to the Hangzhou traffic control department for review and discussion.

The next step is to configure the green wave. Digital Intelligence Green Wave can combine road network data and data such as the speed and flow of corresponding road sections and intersections to intelligently recommend a number of road sections that are most suitable for the construction of the green wave belt, and calculate detailed green wave configuration plans to assist in the final green wave belt construction decision. The traffic police department can select specific road sections for the "green wave scheme" effect experience according to our recommendation results. Then, we use visual intersection stewards to achieve comprehensive input and visual display of green wave construction information such as signal infrastructure, channelization, and flow; at the same time, the road network stewards will integrate information such as road section length, historical vehicle speed, and road section characteristics to generate intelligent recommended vehicle speeds, providing speed guidance for the design of the green wave scheme and ensuring the green wave effect.

Next is the division of time periods and scheme design. Speaking of which, we have to mention the great advantage of our smart green wave products that are easy to use. Smart green wave supports the adjustment and optimization of green wave bands by simple dragging on the time and distance diagram. It can be adjusted individually according to different scenarios (schools, scenic spots), different time periods (morning, evening peaks, daytime peaks), different periods (working days, weekends), etc., and multiple green wave scheme designs for specific intersections and road sections can be carried out. The optimal green wave scheme can also be selected according to the monitoring data and control experience of the traffic control department on specific road sections.

Single-point optimization is also very valuable. In this link, we can combine intersection flow data, intersection characteristic data and intersection signal control data, and accurately optimize the single-point signal control scheme of all intersections in the area to produce a single-point recommended timing scheme divided by time period, which can be automatically or manually issued, or sent to the signal light control system after manual intervention of the single-point recommended timing scheme.

Finally, to the practice running and program optimization, solidification link. We will assist the traffic control department to optimize the overall and single-point green wave scheme in the selected road section for partial or comprehensive practice running, and real-time operation monitoring of the program effect, according to the actual regional, road network program application and then optimized, submitted to the city traffic control department for confirmation, so as to achieve the solidification of the green wave scheme for different intersections and different time periods.

Figure: Daily interactive intelligent green wave belt construction idea schematic

In addition, from the perspective of specific service methods, the daily interactive "digital intelligence green wave" project construction process includes four steps of pilot mode, deployment, product use training, and product optimization and upgrading. During the pilot period, the daily interaction can provide some selected road sections of green wave belt construction and promise corresponding results, providing free training and free product iteration and upgrade services during the maintenance period.

Love Analysis: Can urban transportation be graded with reference to autonomous driving? What is the significance of this in helping smart city governance upgrade?

Fang Yi: Just as autonomous driving can be divided into five levels according to the degree of autonomy from "fully manual to fully automated", we believe that the degree of digital intelligence in urban traffic can also be graded according to the degree of intelligence in the control of traffic lights at various intersections in the city. Therefore, we have developed the "Smart Transportation 6L" classification concept.

Figure: Daily interactive "Smart Transportation 6L" grading concept

Level L1 means that there are signal lights at the intersection, which can be used for basic traffic control. Level L2 means that the signal lights at the intersection are connected to the Internet, and the traffic police can issue instructions remotely for single-point regulation. Level L3 is based on L2, and can perceive digital information such as the queue length and speed at the intersection through radar, cameras, geomagnetism and other equipment installed at the intersection, as well as big data on the Internet. Level L4 can analyze and model the data uploaded at the intersection to form a dynamic, data-guided closed-loop control. Level L5 is based on L4 to realize intelligent coordination of multiple intersections, such as the construction of "digital intelligence green wave belt". Level L6 is to achieve intelligent road management and control, that is, based on data modeling and analysis of regional road characteristics, business districts, schools, etc., it can achieve fine coordinated control of multiple intersections and comprehensively improve regional road functions.

The development process and scale of cities in our country vary greatly, and the investment progress of transportation infrastructure varies widely. Even in some relatively developed cities in the south, a large number of signal lights in the city may still be single-point level and have not been networked. Through the "Smart Transportation 6L" grading concept, the daily interaction can be based on the same language and measurement system with local traffic control departments to help cities find the specific coordinates of different intersections and road sections, and combine the urban transportation construction plan and budget of the year to communicate the upgrade plan of different intersections and road sections, such as upgrading from L1 to L2, or directly skipping to L3. At the same time, based on the agreed upgrade path, the daily interaction can complete the intelligent upgrade of urban transportation facilities at designated intersections and road sections within a certain period of time as agreed, and cooperate with cities to flexibly arrange the upgrade progress. This can greatly reduce the pressure on fiscal expenditure in each year, making the intelligent upgrade of urban transportation visible, controllable, and low-cost. It is expected that the daily interactive "digital intelligence green wave" products will initially be centered on the Yangtze River Delta and then rolled out nationwide.

03 Daily Interaction empowers domestic traffic intelligence with data intelligence core capabilities

Love Analysis: What are the plans for daily interaction in the future in terms of digitalization and intelligent upgrading in the field of transportation?

Fang Yi: In the field of transportation, we mainly have the following two aspects of planning:

In terms of urban transportation, as mentioned earlier, daily interaction will use big data in a very convenient way to achieve initial intelligence of urban transportation. The current is the "smart green wave" solution, and in the future, daily interaction will also use Wi-Fi sensing systems or other new road condition sensing systems in a more refined way, coupled with big data to close the loop, greatly reducing the construction cost of intelligent urban transportation.

In terms of high-speed transportation, Daily Interactive is currently cooperating deeply with Zhejiang Gaoxin Technology joint stock company, a subsidiary of Zhejiang Jiaotong Investment, to help it further deepen its expressway informatization business with DiOS data intelligent operating system; at the same time, Daily Interactive also uses its own technical capabilities to create an early warning system for abnormal situations on expressways, and actively participates in the management of abnormal situations such as highway throwing. Specifically, we use the high-speed "gantry" ETC data to calculate the instantaneous speed of each vehicle entering and leaving and the interval speed between the two gantries, and according to the speed and traffic flow changes between the gantries, combined with expressway cameras, quickly find problems on specific sections of the expressway and give timely warnings to reduce the risk of expressway accidents. At present, the early warning system for abnormal conditions on expressways has been able to detect abnormal sections in about one and a half to two minutes, and inform the expressway traffic police two to ten minutes before the accident so that they can arrive at the abnormal section in advance and quickly for processing. In the future, the daily interaction will further dig into the management scene of high-speed traffic, and continue to work hard to improve the informatization of expressways and reduce the accident rate of expressways.

Love Analysis: What other perspectives do you want to share on road network digitalization, urban transportation governance, and other aspects?

Fang Yi: Now there is a new trend in traffic governance to apply radar and video, but the cost and edge computing cost of this solution are relatively high. In recent years, our domestic computing resources have been greatly improved, but the computing power is ultimately limited, and the rational use of computing power resources has become the key to reducing costs and increasing efficiency. I think that many vehicles, especially new energy vehicles, are constantly emitting various wireless signals such as Bluetooth and Wi-Fi. If traffic management departments build wireless signals to build sensing devices above the ground rather than underground to manage traffic, the difficulty and cost will be much lower, and it will become a new paradigm.

"Digital Intelligence Green Wave" is the result of daily interaction and innovation for people’s livelihood needs. With the general trend of accelerating the construction of a transportation power, a network power, and digital, we are on the road of data intelligence at the right time, hoping to drive more social changes with data intelligence in the future.

Disclaimer: The market is risky, so choose carefully! This article is for reference only and is not a basis for buying or selling.

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　　On the morning of April 3rd, the first delivery ceremony of Xiaomi SU7 was held in the assembly workshop of Xiaomi Automobile Factory in Yizhuang, Beijing. Lei Jun, founder, chairman and CEO of Xiaomi Group, attended the ceremony and personally delivered the car to the first batch of car owners. The delivery center of 28 cities nationwide also started the first batch of delivery simultaneously.

　　Earlier in the day, Lei Jun also announced in Weibo that starting from today, Xiaomi will officially become a car factory.

　　Lei Jun said at the delivery ceremony that in just a few days, Xiaomi SU7 had more than 100,000 orders, and the number of lock orders had exceeded 40,000.

　　It is understood that Xiaomi Automobile’s after-sales network has set up 58 service centers nationwide. In terms of car owners’ service, Xiaomi Auto has established an "exclusive service butler group" for every car owner in Xiaomi Auto App. The service butler+technical experts respond to users’ needs 7×24 hours, and the service process is transparent and traceable. Car owners can enjoy the one-stop service of ordering, picking up, repairing and delivering cars from the App without leaving home. In case of vehicle failure, in addition to providing online diagnosis service for 7×24 hours, when users meet the needs of simple disassembly, pure software failure, tire repair, etc., mobile service vehicles and road rescue can also respond at any time to protect users from traveling.

　　At the same time, Xiaomi Automobile Factory is arranging production in an orderly manner for existing orders, and accelerating the production process steadily and orderly. Xiaomi Automobile Factory, located in Yizhuang, Beijing, has the characteristics of high automation and intelligence. After the production capacity is full, a brand-new millet SU7 will be off the assembly line every 76 seconds. Xiaomi Automobile Factory integrates advanced intelligent technology with traditional intellectual innovation, and more than 700 robots directly serve the production line, realizing 100% automation of key processes such as large die casting, stamping, body connection, body assembly, painting and final assembly, fully ensuring production capacity, and finely controlling production quality to ensure that every millet SU7 can be delivered to users quickly and with high quality.

　　It is understood that at present, Xiaomi Automobile Factory is making every effort to increase production capacity, and fully mobilizing supply chain partners to fully guarantee supply. With efficient and high-quality operations, it will steadily promote the delivery of existing orders as soon as possible and the orderly handling of future orders to ensure the delivery experience of users.

　　This delivery will be the founding version of Xiaomi SU7. The non-original versions of Xiaomi SU7 and Xiaomi SU7Max start delivery at the end of April, and the Xiaomi SU7Pro start delivery at the end of May.

　　Regarding the issue of delivery, Xiaomi Auto officially replied that the first batch of founding editions totaled 5,000 units. In order to start delivery for car owners as soon as possible, the way of production in advance was adopted, and very strict standards were set in all aspects of the whole delivery process such as production, quality inspection and logistics. The original version of the vehicle will complete all the production and quality inspection processes in the near future, and it is being sent to 29 cities one after another and delivered to users.

　　Xiaomi Automobile said that it is currently in a state of explosive orders, and there are continuous new lock orders every day. Orders will be scheduled and delivered in the chronological order of the final lock.

　　Earlier, a video on the Internet broke the news that the test drive of Xiaomi SU7 found abnormal sound and leakage. In this regard, Xiaomi Automobile replied that after investigation, it was confirmed that the actual situation was: at about 11: 30 am on April 1, the clerk of Xiaomi Automobile Store in Xiamen stopped after a sudden abnormal noise while taking the customer for a test drive, and found that the vehicle was in a stable state and the chassis was normal, so the car was driven back to the store normally; After detailed inspection in the store, it was found that a stone invaded the position of the brake disc, causing abnormal noise; After the stone is taken out, the abnormal sound is eliminated and returned to normal.

　　As for the water marks around the car body, it is due to the recent rain in Xiamen, and the vehicle has traveled through the water accumulation area. It is normal for the car body to leave water marks after parking. After testing, the whole vehicle has no leakage, no leakage point, the kettle liquid level is normal, and there is no relevant liquid level alarm fault light prompt.

　　It is worth mentioning that due to the expected release of Xiaomi Automobile, the share price of Xiaomi Group has continued to rise since March this year. On April 2, Xiaomi Group’s share price rose back to the issue price, reaching a maximum of HK$ 17.34 per share, up 8.97% on that day. On April 3, Xiaomi Group’s share price fell back. As of press time, the intraday share price was HK$ 15.90 per share.

　　In the past few days, many departments have repeatedly issued announcements prohibiting any form of wildlife trading. Many places have also isolated places for raising and breeding wild animals. However, according to the first financial reporter, there are still loopholes in "refusing to eat game".

　　A number of people in the industry reported to the First Financial Reporter that over the years, wild animal bodies such as fox meat, mink meat and raccoon meat from farms have been sent to slaughterhouses or small workshops to be processed into roast sausages or ham sausages. In some professional journals, there are even experts who guide how to process the meat of these wild animals into delicious food and sell it on the market.

　　Secrets in the industry?

　　Changli County, Hebei Province has nearly 30 years of fox, raccoon dog and mink breeding foundation, and the fur industry has become a local characteristic industry. The total number of breeding remains at around 8 million, accounting for one tenth of the country, and the total output of raccoon dogs ranks first in the country.

　　Changli County is also the largest fur trade center in China, with an annual trade of 15 million fur and 500,000 live animals, with an annual output value of 8 billion to 10 billion yuan. Changli County was awarded the title of "China fur industry base" and "China raccoon dog breeding hometown" by the Specialty Society of China Agricultural Society. The county has formed a complete industrial chain of mink and raccoon breeding, improved seed breeding, feed and veterinary drugs, commerce, processing and logistics.

　　When the first financial reporter interviewed in the local area, a person in charge of a farm said: "Some people bought fur and some people wanted meat, and sent it to the meat joint factory." When the reporter asked further, the other party seemed a little nervous and just said, "This is a secret that everyone in the industry knows."

　　A person in charge of a group farm in Hebei told the First Financial Reporter that each raccoon skin can be sold around 500 yuan, and the breeding cost of each raccoon is about 200 yuan, and the benefits are still good. However, if there is a problem in the breeding process, the quality of the leather is not good, and some people do not make money.

　　Bad leather does not affect the sale of meat.

　　According to public reports, in June 2014, the Food and Agricultural Products Testing Center of Shandong Inspection and Quarantine Bureau showed the mutton products containing fox meat and mink meat detected by the center.

　　On a food investment website, the first financial reporter also inquired that mink meat and raccoon meat were for sale. The wholesale price of raccoon meat is 2.2 yuan per kilogram, which is far lower than the price of pork and beef.

A food business network sells information about mink meat and related meat grinding equipment.

　　There is even a medical science popularization WeChat official account who issued a document saying, "For 2 yuan, if you want to eat beef sausage or pork sausage, it is basically impossible." "A more formal manufacturer will use chicken. Generally, the main ingredients are chicken breasts, chicken skin and duck skin, and then the main flavoring substances — — Pork essence, monascus red pigment, preservative, and filler starch to reduce cost. Some manufacturers may use fox meat, mink meat and so on. Because these meats come from farms, as long as the farms are fur, the meat is generally free. "

　　On a professional website containing various academic journals, the First Financial Reporter inquired about many papers such as Development and Utilization of Raccoon Meat, Development of Cumin Raccoon Meat Enema, Study on Comprehensive Utilization of Raccoon Byproducts: Utilization of Raccoon Carcass Meat, etc.

　　Among them, it is mentioned that "raccoon dogs are an important wild animal resource in northeast China, and in recent years, there are many artificial breeding in various places." "Most wild animal farms, after slaughtering and skinning, some smash raccoon meat as feed for fur animals, some dispose of it at a very cheap price, or even discard it", and "processing it into food can create higher profits for farms (households)".

　　Some experts instructed in the paper that "because the carcass of raccoon dogs is small, it is not easy to be removed, and the meat of raccoon dogs has a slightly earthy smell, so it is made of ‘ Braised canned food ’ The process, and pay attention to adding condiments that can remove the earthy smell in the formula to improve the flavor and palatability of the product. " "In order to eliminate the odor of raccoon meat and improve its edibility, ‘ Spicy Sichuan sausage ’ The formula and its technology, the main processing steps include thawing-cleaning-removing tendons, connective tissues and fat-cutting into small pieces-soaking in clear water-mincing-seasoning-pickling-canning-steaming-smoking, etc. "

　　Some experts in the industry have also calculated that the average raw material cost per kilogram of sausage is 5.98 yuan. If it is sold at 10 yuan/kg, the gross profit per kilogram can be 4.02 yuan. If 10,000 raccoon dog carcasses are processed every year, 14,737 kilograms of spicy Sichuan sausage can be produced, and the gross profit can be more than 59,000 yuan, with considerable benefits.

A raccoon and mink farm in Changli County, Hebei Province. Photography/Zhangke

　　There are hidden dangers in the wild animal meat in the farm.

　　Are wild animal carcasses such as mink meat and raccoon meat from farms safe? According to insiders, unlike pork, beef and mutton, which are subject to strict inspection and quarantine, mink meat and raccoon meat are usually only used for fur, and their meat is usually not included in the range of meat food raw materials, and most of them are not inspected and quarantined.

　　Experts such as Ren Qiao from the College of Animal Science and Technology of Qingdao Agricultural University introduced that on February 25, 2012, minks in a mink farm in Hongdao, Qingdao developed symptoms and then died in large numbers. The investigation found that the farm was fed with a mixed feed made by itself, and raw fish, chicken head, eggs, pig liver and puffed corn flour were mixed evenly and diluted before feeding. The symptoms of sick mink are depression, loss of appetite or no food. Most minks are paralyzed in hind limbs, with acute onset and high mortality. Through pathological autopsy and laboratory test, the initial diagnosis was Clostridium botulinum poisoning in mink.

　　Ren Qiao introduced that mink Clostridium botulinum poisoning is an acute fatal poisoning caused by eating meat feed containing Clostridium botulinum toxin. Clostridium botulinum spores are widely distributed, and Clostridium botulinum is often contained in animal intestinal contents, feces, decaying corpses and decaying feed. The bacteria breed in animal carcasses, meat and feed to produce toxins. The main source of infection of Clostridium botulinum poisoning in mink is the feed contaminated by this bacterium.

　　Bao Linlin, an expert from the Institute of Experimental Animals of China Academy of Medical Sciences, introduced that human H5N1 subtype avian influenza virus A/Vietnam/1203/2004 was selected to carry out artificial infection test on ferrets. The results showed that human H5N1 avian influenza virus could infect ferrets, and the mortality rate of virus titer was 33%. The virus can be isolated from the heart, liver, spleen, kidney, small intestine and brain tissues of infected ferrets, which shows that the virus can infect ferrets’ lungs, brains, livers, kidneys and other organs and cause nervous system infection, which has the same characteristics as the H5N1 avian influenza virus strain that infects people.

　　In addition, some insiders told the First Financial Reporter that in order to increase the luster of mink, raccoon and other fur, farmers usually add some hormones during the breeding process, and people will do harm to their bodies after eating these animals.

　　After the COVID-19 outbreak, 19 academicians and scholars jointly called for putting an end to the illegal consumption and trading of wild animals and controlling the major public health crisis from the source. According to the appeal letter, there are loopholes in the domestication and breeding of wild animals, which are often called protection, domestication or breeding. In fact, it is illegal to buy, sell and eat wild animals, laying a hidden danger for the trade and consumption of wild animals.

　　According to the first financial reporter, recently, Fujian, Guangdong, Hainan, Yunnan and other places have closed down artificial wild animal farms and breeding grounds, and prohibited wild animals from spreading, transporting and selling.

　　"The trade and consumption of wild animals is mainly not a legislative issue, but more a problem of lax law enforcement." Shi Yucheng, a professor at Gansu University of Political Science and Law, said.

　　Ran Jingcheng, a member of the Standardization Technical Committee of National Parks and Nature Reserves, also said a few days ago that scientific research on wildlife breeding technology should be increased, and those species that can promote economic development, poverty alleviation and rural employment should be encouraged to carry out technical research and publish technical standards. Fixed-point processing of artificially bred wild animals and strict quarantine procedures.