The function of health code is to quickly identify whether a person has directly or indirectly contacted infected patients through the color of health code. Then through big data analysis, you can directly lock and find people who may be infected.
Health codes are based on real data and can be generated by citizens or people who have returned to work through online declaration and background audit. As a personal entry and exit area in electronic certificate, the QR code can be declared once, which is universal in the whole city.
Green code, I can pass the code. The yellow code, I must be isolated at home 14 days under the supervision of my unit and community, and I can not change it to the green code until I declare my health punch card 14 days continuously. Red team, I must undergo centralized isolation medical observation or go to a nearby fever clinic under protection. After 4 days of continuous declaration of health punch/kloc-0, you can change the green code.