Go to the mobile banking website of China Postal Savings Bank, enter the login password of mobile banking, and click "Login". Log in to Mobile Banking and enter "Mobile Payment-Payment Function Switch". Select the account to be set, and click the Close or Open button to enter the verification interface. Enter the verification password according to the customer type, and then click the confirm button.

Postal credit cards can also be bound to third-party payment software for mobile payment. Take Alipay as an example: log in to Alipay account, apply for quick payment, and click Apply Now. Select your bank card issuer and bank card type in the newly opened page, and then click "Next" to fill in the real personal information, fill in the bank card number and mobile phone number where the mobile phone number is reserved, and fill in the check code received by the mobile phone after obtaining the check code for free, and the opening is successful.