"Health Code" is a tracking and judging system of personal health information and activity information for epidemic prevention and control in COVID-19. Based on real data, citizens or people who have returned to work can make their own online declaration, and generate personal QR code after background audit, which can be used as personal declaration in a certain area of electronic certificate for local use.
There are three kinds of "health codes": the green code can directly enter the place, the red code is isolated for 14 days, and the yellow code is isolated for less than 7 days.