Unable to refresh health code due to poor network signal. It is recommended to restart the mobile phone in a good signal place and refresh the health code again.
The health code cannot be scanned for the following reasons: The current user network is poor, so users are advised to check the status of the mobile phone network. The current health code is invalid and the results cannot be scanned. If the health code is invalid, the user can refresh it again. 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.