1. Definition of credit card With the development of credit card business, the types of credit cards are increasing. In summary, there are generally broad credit cards and narrow credit cards. Broadly speaking, any special card that can provide the cardholder with a credit certificate and allow the cardholder to shop, consume or enjoy specific services can be called a credit card. Credit cards in a broad sense include credit cards, quasi-credit cards, debit cards, savings cards, cash cards (ATM cards), check cards and charge cards, etc. In a narrow sense, foreign credit cards mainly refer to credit cards issued by banks or other financial institutions, that is, credit cards that can be used for loan consumption without pre-deposit, and credit cards that consume first and repay later; domestic credit cards mainly refer to loan cards. A credit card is a quasi-credit card (a credit card that allows for small amounts and goodwill overdrafts after depositing money first). In appearance, a credit card is as big as an ID card and is generally made of special plastic with a specially designed pattern printed on the front. The name and logo of the institution, as well as the card number, name of the holder, validity period and other information printed in embossed characters or flat form; on the back of the card, there is a magnetic strip for recording relevant information, a signature strip for the cardholder to sign, and Description of the card issuer, etc. 2. Characteristics of credit cards Credit cards are one of the fastest growing financial services today. They are electronic currencies that can replace traditional cash flow within a certain range; credit cards have both payment and credit functions. Function. Cardholders can use it to purchase goods or enjoy services, and can also obtain certain loans from card issuers through the use of credit cards. Credit cards are high-tech products that integrate financial services and computer technology. 3. The role of credit cards: Credit cards can reduce cash. The use of currency; Credit cards can provide settlement services, facilitate shopping and consumption, and enhance a sense of security; Credit cards can simplify payment procedures and save social labor; Credit cards can promote product sales and stimulate social demand. Currently, the main international organization is Visa International. Two major organizations (VISA International) and MasterCard International (MasterCard International) and three professional credit cards: American Express International Co., Ltd. (American Express), Diners Club, and JCB Japan International Credit Card Company (JCB) Company.