Health code is a personal two-dimensional code based on actual real data, which is generated by citizens or people who have returned to work on their own online declaration and background audit. As an individual entering and leaving electronic certificate locally, the QR code can be declared once, which is universal in the whole city. The introduction of the health code aims to make the work of returning to work more accurate, scientific and orderly.
In 2002110/0, the National Development and Reform Commission, in conjunction with various departments, issued the Opinions on Doing a Good Job in the Prevention and Control of Spring Festival travel rush's Emergency Transportation, requiring Spring Festival travel rush to promote health codes nationwide during the emergency transportation to avoid gathering due to scanning codes. National mutual recognition of health codes during 4.202 1 Spring Festival travel rush. Adding code is a special case. If there are real reasons for not being able to recognize each other with other regions for the time being, it shall be reported in advance.