Debit card is a payment and settlement tool issued by the issuing bank to the society, which has the functions of transfer settlement, cash deposit and withdrawal, shopping and consumption. Debit cards have no overdraft function. The cardholder must deposit funds in advance, and the deposit in the card pays the deposit interest according to the corresponding deposit period.

Credit card refers to a kind of credit certificate and payment tool issued by banks or specialized companies to cardholders for cash withdrawal, settlement or direct consumption in shopping malls, restaurants, hotels and other consumer places. Credit card is a debit card, which means that the issuing bank gives the cardholder a certain credit line, which is a short-term revolving loan line to the cardholder in common parlance.