Bank of Beijing only has a passbook. How can I change my mobile phone number?

1. First of all, Bank of Beijing can only change its passbook into its own mobile phone number, and can modify the information of the reserved mobile phone number for opening an account.

2. Secondly, the mobile phone number information retained in the original passbook can be changed.

3. Finally, customers should bring valid identity documents, bank accounts and new mobile phones to any branch of China Construction Bank for consultation.