General health codes don't turn yellow for no reason. If the health code turns yellow, it is generally caused by the following reasons: 1. Time and space entourage, control area personnel, prevention area personnel; 2./kloc has lived in the city where the epidemic occurred for 0/4 days; 3. After the implementation of health management services, red team personnel will be converted into yellow code personnel; 4. The yellow code personnel are from the national health code; 5 by the local epidemic prevention and control office to determine the yellow code should be assigned to the staff.
The health code is based on real data, which is declared by citizens on the Internet. After background review, the personal QR code can be generated. 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.