Health codes cannot be scanned all the time.

Hello, 1, WeChat health code cannot be scanned. Maybe there is something wrong with the system or network. You can wait for a while, or try another mobile phone network.

2. It may be because the health code is invalid and cannot be scanned. Click "Update Now" on the QR code to refresh. In addition, by default, the health code is valid for 7 days. The health code has expired, and you need to declare your health again to get it again.