The situation of anti epidemic is grim, especially when all parts of the country begin to enter the state of war, the front-line feedback information is worrying.
No matter how serious the front-line staff are, they don''t miss everyone and record everyone''s whereabouts... Without a unified database, everything seems so difficult.
It''s not a difficult problem, but it''s impossible to do it at all.
There are 1.4 billion people in the country. It is almost impossible to control everyone''s whereabouts during the epidemic.
Specific to every province, city and county, the difficulty is basically similar. The front-line personnel are busy in a mess, but in most cases they can only "make do".
On February 3, after Lin''an implemented the strictest measures of closed management in the city, Yuhang District, as one of the first districts and counties in Zhejiang Province, was aware of this problem.
Not only they can realize it, but they can solve it.
Ali, the top Internet giant in China, headquartered in Lin''an, is duty bound to undertake this impossible task.
Yuhang area, including aliyun, nails, Alipay and other virtual online teams, urgently develops green code, and implements "crowd coverage + whole process palm office + whole field joint defense".
This is a sudden war
This is an algorithm that needs to be "100% accurate"
This is a new technology related to the precise control of the epidemic
Li Haolong led the project team to undertake this task to overcome the control work that is difficult to ascend the sky in the old environment.
Before that, Li Haolong watched the live broadcast of huoshenshan on TV. He regretted that he didn''t go to Shandong to learn to open an excavator.
If you can dig an excavator, you will certainly drive an excavator on the volcanic God construction site to achieve China''s speed with your hard work and sweat, and build the infectious hospital most needed by the Tianhe people at the fastest speed.
Or if I had studied medicine in those days, now I join the team of rushing to rescue Tianhe, flying against the wind and surging blood in my heart.
But the opportunity to fight the epidemic came.
After receiving the task, all Li Haolong''s hair stood up. Although they are legendary programmers, not every programmer will be bald.
however
Li Haolong''s initial team consisted of only four people
There is no comparison between a poor number of people and a great responsibility.
Compared with the number of people, the complexity and accuracy of the algorithm increase exponentially.
Normally, if an algorithm has an accuracy of more than 90%, it can be regarded as a commendable model.
However, Yuhang health code is very important. One hair will affect the whole body, and one wrong hair will have a great impact. It must be 100% accurate.
Li Haolong used to knock the code for work. His boss said something like 996 blessing... Giving overtime pay is naturally blessing. The more he gives, the harder he works, and the more employees look like wolves.
But this time it''s different.
Once upon a time, I knocked the code for money; Now knock the code, is to win, is to hold the virus''s throat with both hands.
But
A cavity of warm blood is not enough.
Health code, too difficult!
Although it is only a Yuhang health code, Li Haolong knows that in essence, as long as the base is completed, the health code of Zhejiang Province and even the whole country can come naturally.
The first step is often the hardest.
The task requires that having a smartphone can be associated with the most cutting-edge Internet technology, whether in Beijing, Shanghai, Guangzhou, Shenzhen and Hangzhou, or in remote frontier or mountainous areas.
In the past thousands of years, human beings and information have been separated.
The invention of language, writing, printing, Telegraph and Internet can make people better find information. After entering the era of mobile Internet, mobile phone has become an information organ of human beings.
Criminals on the Internet buy personal privacy and use it to commit fraud.
The health code should not only meet the requirements of the area, but also protect the privacy of users.
However, how to output this complex information efficiently and accurately is tantamount to a war, and cloud computing is the technical support of this revolution.
Day and night, Li Haolong and everyone in the project team knew that they had become an integral part of the war.
They don''t know how much they can play, but they can come when they are called, fight and win!
At this moment, they burst out with unprecedented enthusiasm. Line by line code is like masks, protective clothing and respirators to support the war against the epidemic.
In the winter of chaos and chaos, there is a panic everywhere, and everything on the Internet is full of soldiers.
Li Haolong no longer pays attention to the information that is difficult to distinguish between true and false. He joined other Ali project teams to start his own war.
This is their battlefield.
For more than 80 hours, I slept casually when I was sleepy. I didn''t even remember whether to eat the last meal. I didn''t dare to delay a minute.
Finally, on the evening of February 6, Yuhang green code was officially completed.
Intense detection and elimination of all loopholes. Yuhang green code was officially launched in the early morning of February 7!
Li Haolong didn''t stop. He took an increasingly large project team to track Yuhang green code, correct loopholes and ensure "100% accuracy".
Within 24 hours, 269000 people entered information completely in Lin''an Yuhang District.
The first battle,
Success!
Just as Yuhang green code was making a vigorous sprint to go online, Hangzhou health code project team was also racing against time.
On February 6, Secretary Zhou of Lin''an put forward at an important meeting that in order to do a good job in enterprise resumption, we should give full play to the advantages of Hangzhou''s digital economy, establish a unified digital declaration platform in the city, implement personal electronic health code and realize timely information sharing.
Both the fight against epidemic diseases and the economy should be grasped and both hands should be hard.
With the passage of time, it is urgent to resume work and production.
When the country presses the pause button, can strategic materials resist for half a month, a month or more? We must speed up the resumption of work and production, and we must not miss any workers who may be infected.
The situation was extremely complex, and the meeting put forward a request: take out the health code of enterprise employees the next day.
Just a business logic diagram is extremely complex.
On February 8, the enterprise employee health code was launched quickly. The development team immediately turned into the Lin''an health code project team, and more technicians were deployed.
With the foundation, with the efforts of more programmers, everything is ripe.
On February 9, the first version of Lin''an health code was completed.
Countless people spent all night looking for mistakes and making corrections.
Different from the slightly crude Yuhang health code, Lin''an health code associates the personal identity with the confirmed or suspected data summarized by the national health department and the data provided by the aviation and railway departments to generate a two-dimensional code pattern.
The health code system is generally divided into five levels: infrastructure layer, data resource layer, application support layer, business application layer, user and service layer.
Each branch performs its own duties, and each branch tries its best to type out line after line of code.
Most of them can''t leave their names in the times. It''s like war. No matter how magnificent the battle is, it is composed of countless "unknown people".
But it doesn''t matter.
Winning the war against the epidemic and speeding up the time to resume work and production are the most important things at present!
No one.
They are faced with extremely complex situations, and various running in between departments are smoother than ever before.
At present, everyone has worked together to become the "nobody" of the times and solve many headaches.
Ding Xianshu, the product manager of the code engine, picked up wisps of hair.
Typical situations, concise lines of action, these have been solved, but complex situations are collapsing.
Sometimes Ding Xianshu feels that he has returned to primary school and started doing those heinous problems.
For example, driving through the epidemic area, whether to rest in the rest area is one thing, and whether to stay in Hubei for a night is another matter; Take the bullet train and pass through the epidemic area. There are many people getting on and off. How to distinguish and calculate, and how to design the engine
Or there are suspected or confirmed cases in the community. Does the health code turn yellow or direct red, or the same color
This is not only the problem that programmers have to face, but also like the highest exam in sociology.
In particular, it is crucial that the epidemic situation changes all the time.
With the emergence of asymptomatic and false negative infections, a place is upgraded to a dangerous area. Each change of situation means the change of rules.
How to deal with the logical relationship of rule change is comparable to Olympiad.
On February 11, Lin''an City officially launched Hangzhou health code and implemented three color dynamic management of "green code, red code and yellow code".
On February 12, Zhejiang Province decided to extend the health code to the whole province.
Behind Zhejiang health code is a huge project that needs coordination, involving technology, products, legal affairs and customer service... Many departments in Zhejiang Province are fighting side by side with Alibaba cloud data intelligence team.
Everyone in the project team knows that what they are doing is of great significance.
Walking on thin ice every day is like licking blood at the edge of a knife. Li Haolong is afraid that system problems will have an adverse impact on epidemic prevention. He wants to check over and over every line of code he writes.
One hundred percent, which is basically impossible for programmers, has become a "non-specific" requirement for Li Haolong and many members of Ali''s project team.
Must be 100%!
After a series of personnel and post cooperation in demand, product design, UI design, front-end, back-end, testing, operation and maintenance, consider the feasibility and rationality together.
lose sleep and forget to eat from anxiety , etc.
make a pillow of one ''s spear waiting for daybreak
Behind the seemingly simple health code are the efforts of countless people, as well as the top network laying and the construction of information society.
New situations, new periods, new ideas, and an inexplicable war are refining the cornerstone of the network era in New China.
Mobile location,
Cloud computing for massive data
Big data related
After countless things were handled in a short time, Ali''s project team handed over a satisfactory answer.
Li Haolong and other technicians didn''t expect that 92 days later, a murderer who had absconded for 24 years would defend himself because he had to show his health code wherever he went.
The anti epidemic Skynet they weave has a funny "side effect".