1. First of all, it may be caused by network reasons. This may happen if the speed of the mobile phone is poor or there is no Internet connection. Users are advised to switch the mobile phone network, or disconnect the network and then reconnect.
2. After eliminating the network reasons, it may be caused by the inconsistency between the real-name authentication information of the user health code and the login account information. Users are advised to check it.
3. If the problem cannot be solved, it may be a background program problem. Users are advised to try again after a while.