1. Cardholders can go to any branch of China Guangfa Bank with their valid identity documents and their Guangfa credit cards to make changes, and fill in forms and materials to make mailbox changes under the guidance of the counter staff.

2. Call the customer service hotline with the mobile phone number reserved in Guangfa Bank, transfer the manual service under the voice prompt, make a request to modify the mailbox, and then make the modification under the guidance of customer service.

3. Download the wonderful APP, log in to your account, click "My", modify your personal information, and find the modified email address in it.

4. Send "406+ 4 digits at the end of the card+email address" to 95508 with the reserved mobile phone number.