From the end of 20 19 to the beginning of 2020, COVID-19 epidemic spread in Wuhan and other areas of China, monitoring people's mobile information and health information has been a very important means of epidemic prevention in China. Combined with the popularity of smart mobile terminals, health codes came into being. By filling in the applicant's personal information, address information and recent travel information, the applicant's mobile phone can automatically generate a two-dimensional code to indicate whether the applicant belongs to the suspected susceptible population in COVID-19 with simple colors, and then guide the traffic service personnel how to receive travelers according to the information of the health code.
On the health code, when it is judged as a susceptible population in COVID-19, the QR code will display red. People with a red health code need to undergo self-isolation observation for 14 days to check whether they have COVID-19. If people have recently moved in high-risk areas or come into contact with high-risk people, their health codes will also be displayed in red. People with orange health code need to observe their body temperature regularly every day to avoid going to crowded areas. People with green health code are low-risk people who can work normally and go to crowded shopping malls, subways and railway stations.
In the past, health codes were often counted by provinces, autonomous regions or municipalities directly under the central government. Once you leave your original place of residence, you need to declare your health code again. Such statistical results are both troublesome and imperfect. If the health code can be unified throughout the country, people who go out will be able to make health information statistics better, and will also show more scientifically whether a person's health is at a medium risk or a high risk level. Local epidemic prevention and control inspectors can also accurately understand the health information of the personnel, avoid the fish escaping from the net in the epidemic prevention and control work, and reduce the difficulty of checking the activity track of the personnel afterwards.