I suddenly received a text message from Tencent saying that I was registering a WeChat account.

Maybe someone registered WeChat with your phone number or someone else filled in your phone number incorrectly.

WeChat account registration process: first open WeChat, click "Register", and then fill in the nickname, mobile phone number and password. After filling in, click "Register", and the system will verify your mobile phone number. After verification, the system will send a verification code, and the registration can be completed upon receipt.

Therefore, when someone enters the mobile phone number incorrectly, entering your mobile phone number will send you a verification code. Or someone else takes your mobile phone number to authenticate things in WeChat, and then WeChat will always send you messages for authentication.

Solution: Generally speaking, I don't need to pay attention to his verification code, just don't disclose it. The mobile phone number currently used is registered WeChat. It is possible that someone else is using your mobile phone number to register WeChat. This is sometimes harassment, but if the other party can't get your SMS verification code, then the registration is unsuccessful. This is inevitable.