The mobile phone number of China UnionPay Express has changed, so you can't log in.

Does the subject want to ask, "What if the mobile phone number of China UnionPay Express has changed and I can't log in?" ?

1. First, open the China UnionPay Express Pass application and click "Forgot Password" or "Retrieve Password" on the login page. According to the prompt, enter the original mobile phone number or user name, and select the verification method, such as SMS verification code or email verification code.

2. Secondly, enter the received verification code for authentication. After the verification is successful, you can set a new password.

3. Finally, log in to China UnionPay Express application with the newly set password.