The banks beginning with 622 1 include China Postal Savings Bank, China Construction Bank, China Everbright Bank and Ping An Bank. Under normal circumstances, if users want to find out which bank a bank card belongs to, they must provide at least the first six digits of the bank card to find out which bank it is.

The front of the bank card is the card number, and the bank card will not have duplicate card numbers, which is also the only identity authentication. Debit cards are generally 19 digits, and credit cards are 16 digits. The beginning of 62 stands for UnionPay and the beginning of 4 stands for VISA card.