Social security cards are processed at the Postal Savings Bank of China. The bank card bound to the electronic social security card is issued by the bank where the user's social security card is located. The social security card is issued in the form of a bank co-branded card. If it shows a Postal Savings Bank credit card, it means that the social security card was processed at the Postal Savings Bank of China. . When binding a social security card, the bank card information bound to WeChat payment will be retrieved, and the user information of the bank card will be compared with the user information of the social security card database. Only if the information is consistent can the card be bound, and the WeChat payment password will need to be verified.