Credit cards are generally plastic cards with a special carrier, with a length of 85.60 mm, a width of 53.98 mm and a thickness of1mm. The name of the card issuer, the expiration date, the number and the name of the cardholder are printed on the front, and the chip, magnetic stripe and signature strip are printed on the back. Cardholders can use credit cards to shop, spend money and deposit and withdraw cash from banks.

Credit cards are divided into credit cards and quasi-credit cards. Credit card refers to a credit card in which the cardholder has a certain credit limit and can spend first and then repay. Quasi-credit card refers to a quasi-credit card in which the cardholder deposits a certain amount of reserve fund according to the regulations, and when the balance of the reserve fund account is insufficient to pay, it can be overdrawn within the prescribed credit limit. Credit cards generally refer to credit cards.