Operation method
The WeChat number can only be modified once, and cannot be modified again after being modified once. If you want to set a special WeChat signal for you, you can register a new WeChat signal for use.
WeChat setting rules: 6 to 20 letters, numbers, underscores and minus signs can be used. They must start with a letter (case insensitive). Chinese settings are not supported and can only be set once.
WeChat modification method: Open WeChat and click "I" in the lower right corner.
Click to enter "Settings".
Click to enter "Account and Security".
Click "WeChat" to modify. If it cannot be modified, it means that the WeChat account has been modified before and cannot be modified again.