2. Significance: The "health code" is based on real data, and can be generated by citizens or people who have returned to work through their own online declaration and background check. As an individual entering and leaving electronic certificate locally, the QR code can be declared once, which is universal in the whole city.
3. Scope of application: the application scope of health code covers community management, resumption of business, transportation, school opening, drug purchase registration, supermarkets and shopping malls, and can help communities, enterprises and schools to do key work such as epidemic prevention management and epidemic control.