The login may be caused by incorrect account password input. Just click Forgot Password to change your password again, or it may be because the network is unstable and you can't log in again. Check whether the mobile phone network is normal, which may be caused by the damage of the mobile phone. You can choose to change your mobile phone and try again. It is also possible that the health code scan failed, and you can try to refresh the network. 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.