Data expansion: Credit card is a kind of card provided by the bank to users, and it does not need cash when paying, as long as it is repaid on the specified date. 1. Credit cards are divided into credit cards and quasi-credit cards. 2. The function of credit card: it is convenient for people's life and saves the trouble of carrying cash. 3. Credit cards are useful: they can relieve economic pressure and owe little or no human feelings; You can add points to your credit information.