1. Check the network connection: Make sure that the mobile phone or device is connected to a stable network, and switch to other networks, such as Wi-Fi or mobile data, to see if it can solve the problem.

2. Restart the phone: Try to restart the phone or device. Restart to solve temporary network or system problems.

3. Clear the cached data: find the application management or application in the settings of the mobile phone and find the WeChat application. In the WeChat application information, clear the cached data and restart the WeChat application. Can solve the login problem.

4. Update WeChat application: Make sure to use the latest version of WeChat application. Go to the AppStore (such as GooglePlay or App Store) to see if there are any updates available and install them.

5. Reset the WeChat password: unable to verify, you can reset the WeChat password. On the WeChat login page, select "Forgot Password" at the bottom of the login box, and then follow the prompts to reset the password.

6. Contact WeChat customer service: The above methods are invalid, so you can contact WeChat customer service for help. Wechat customer service will be able to provide more specific guidance and support to help solve the login problem.