The purpose of health code is to achieve accurate and scientific prevention and control by means of information technology. The green code means "nothing unusual" and you can pass normally. The yellow code indicates the need for "investigation" or "home health monitoring". The red code indicates that measures such as isolation treatment in designated medical institutions or centralized isolation medical observation should be taken.
1. The health code is based on the actual real data, and it can be generated by citizens or people who have returned to work after self-declaration online and background audit.
2. As a electronic certificate where individuals pass in and out locally, the QR code can be declared once, which is universal in the whole city.