Why did you suddenly receive the verification code of the knowledge tree?

It may be that the other party tried to log in with his mobile phone number.

Mobile phones don't receive verification code messages from websites for no reason. Generally, your mobile phone number is leaked, used by criminals, bombarded by short messages, and spam messages such as verification code are sent to your mobile phone number in a short time. It may be that the other party tried to log in an account with his mobile phone number. In addition, it is also possible that someone else entered the wrong mobile phone number.