What you want to ask is why the payment slip at the medical insurance card window shows that it is a credit card? When paying at the medical insurance card window, the payment slip shows a credit card because the social security card has the function of a credit card. The social security card also has the function of a bank credit card. This is a preliminary measure taken by the government to fully realize the multi-function of one card in the future. As a result, it will be shown as a credit card on the payment form. Therefore, the payment slip at the medical insurance card window shows a credit card because the social security card has the function of a credit card.