Why does QQ always say that it is wrong to bind the verification code of mobile phone secret security?

The error of password verification should be caused by the incorrect answer to the password question, which can be verified by other means, such as sending a short message to the bound mobile phone number or calling for modifying the answer to the password question. The modification method is as follows:

1, open the QQ security center/login, and click the security question to modify it.

2. Confidential information can't be used. Enter the complaint modification process.