Bank card format: credit card: generally, it is 14- 16 digits. The card number of 16 digits is an international standard, and the first 6 digits are BIN, which is allocated by international card organizations; The first card number of a credit card, VISA is 4 and Master is 5. 622 126~622925 is a unionpay standard card. Savings card: 19 digits, and the card number of each bank is different, with a total of 15- 19 digits. The first six digits of the card number represent the identification code of the issuing bank, also known as the box number; Different bin numbers represent different bank card organizations and card levels.

Bank card refers to a credit payment tool issued by commercial banks (including postal financial institutions) with all or part of the functions of consumer credit, transfer settlement, cash deposit and withdrawal, etc. Bank card reduces the circulation of cash and checks, which makes the banking business break through the limitation of time and space and undergo fundamental changes. The application of bank card automatic settlement system makes the dream of "no cheque, no cash society" come true.

debit card

Debit cards are divided into transfer cards, special cards and stored value cards according to different functions. Debit cards cannot be overdrawn. The transfer card has the functions of transfer, cash deposit and withdrawal and consumption. Special card is a special-purpose debit card used in a specific area (except for department stores, restaurants and entertainment industries). It has the functions of transferring money and depositing and withdrawing cash. Stored value card is a prepaid wallet debit card in which the bank transfers funds to the card for storage according to the cardholder's requirements, and directly deducts money from the card during the transaction.

credit card

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.