The health code cannot be scanned for the following reasons: 1. At present, the user's network is poor, so users are advised to check the mobile phone network status. 2. Only when the current health code is invalid will the results not be scanned. If the health code is invalid, the user can refresh it again. 3. The current system is out of order, so users are advised to wait for some time before re-operating. Due to the epidemic, people need to scan the health code to locate everyone's location.
Health code is a personal two-dimensional code based on actual real data, which is generated by citizens or people who have returned to work on their own online declaration and background audit. As an individual entering and leaving electronic certificate locally, the QR code can be declared once, which is universal in the whole city.