Inquiry method of bank card number on electronic social security card 1 Open wechat, enter the payment interface, and click city service->. Social security. 2. After entering social security, click on the electronic social security card, and then click on the one-card service. 3. After entering, click View Documents. 4. After entering, enter the password of the electronic social security card and click OK. 5. After entering, you can see the bank card number bound by the social security card, and you can check it if necessary.