2. Bank cards include credit cards and debit cards. Debit cards have no overdraft function, but credit cards can be overdrawn. Credit cards are divided into credit cards and quasi-credit cards. Credit card refers to the credit card that the issuing bank gives the cardholder a certain credit limit, and the cardholder can spend first and then repay. Quasi-credit card refers to a credit card in which the cardholder deposits a certain amount of reserve fund according to the requirements of the bank, and when the reserve fund is insufficient to pay, it can be overdrawn within the credit limit stipulated by the issuing bank.