What is the reason why Health Daily does not show it?

There is nothing abnormal in the health display, but the reason why the information cannot be scanned is 1. Unable to refresh the health status display due to poor network signal. It is recommended to restart the mobile phone in a good signal place and refresh the health code again. 2. The health code is invalid and cannot be scanned. You can click Update Now on the QR code to refresh. The default validity period of health codes is seven days. When the health codes expire, they cannot be scanned. You need to report your health again to get it again. 3. There is also a situation that the current number of visits is too large, which leads to the collapse of the website and the failure of health display.