If the billing address is maintained, operate in Account Management-Billing Address Settings;
If you want to change the mailbox, you can log in to Professional Edition and modify the settings of Customer Management-Mailbox.
If you don't have a professional version, you can download and open the Pocket Life APP, and modify it in "Card * Finance-Data Management": send personal information such as address, mobile phone number, certificate information and emergency contact, or call our customer service hotline-enter the account opening certificate number #-and the system will enter the verification process -9, and modify it after you verify your identity.