The number on the bank card represents the bank card number.

the front of a bank card is the card number. A bank card is a card number, which is also the only identity authentication. Debit cards generally have 19 digits, while credit cards generally have 16 digits. The card number at the beginning of 62 stands for UnionPay, the card number at the beginning of 4 stands for VISA and the card number at the beginning of 5 stands for MasterCard.

if it is a credit card, the valid date is below the card number, the number after the slash is the year, and the month is in front; The number on the signature strip on the back of the card is CVN2 code, which is mainly used as a proof of payment.

Extended information:

Bank card refers to a credit payment tool that is approved by commercial banks (including postal financial institutions) and has all or part of the functions of consumer credit, transfer settlement, cash deposit and withdrawal, etc.

bank cards have reduced the circulation of cash and checks, which has made the banking business break through the time and space constraints and undergone fundamental changes. The application of bank card automatic settlement system makes the dream of "no cheque, no cash society" come true.

Reference: Bank Card-Baidu Encyclopedia