Credit card, also called debit card, is a credit certificate issued by a commercial bank or credit card company to eligible consumers. It is a card with name, expiration date, number and cardholder's name printed on the front, and a magnetic stripe and signature strip on the back.

Credit cards are divided into credit cards and quasi-credit cards. Credit card refers to a credit card in which the cardholder has a certain credit limit and can spend first and then repay. Quasi-credit card refers to a quasi-credit card in which the cardholder deposits a certain amount of reserve fund according to the regulations, and when the balance of the reserve fund account is insufficient to pay, it can be overdrawn within the prescribed credit limit.

The main functions of credit cards are as follows:

1. It is convenient for people's life and saves the trouble of carrying cash. And there are no geographical restrictions on using credit cards. Whenever you swipe your card anywhere in China, you can swipe it as long as you have the UnionPay logo, and there is no handling fee.

2. Be able to participate in various discount activities in cooperation between merchants and banks;

3. The points earned by credit card spending can be exchanged for gifts;

4. Timely repayment after swiping the card will enhance the credibility of personal banks;

5. installment payment. The inherent core characteristics of credit card determine that the shopping mode of installment payment can be realized through circulating credit. In fact, the revolving credit provided by the credit card is a small consumer loan provided by the card issuer to the cardholder, which allows the cardholder to make credit shopping with the credit card and realize installment shopping through partial repayment.