The history of credit cards can be traced back to the early 20th century, the birthplace of credit cards (America). But at that time, the cards were all made of metal, and the distribution targets were limited, limited to some places. For example, 1924, General Petroleum Company of the United States launched petroleum credit cards for employees and specific customers, which were presented to customers as VIP cards as a means to promote petroleum products. Later, it was also issued to the general public, which attracted other oil companies to follow up because of its good effect. Telephone, aviation, railway companies and other industries have followed suit, and the credit card market has become active. The development of credit cards has suffered two setbacks. First, during the great American economic panic, many companies suffered losses due to bad debts and credit card fraud. Second, during World War II, the Federal Reserve Board banned the use of credit cards during the war. However, none of these can stop the development of credit cards. At that time, the use of credit cards was limited, and the rudiment of modern credit cards was basically available until 195 1 came out. When the cardholder shows this card for consumption, there is no need to pay cash. Instead, Dinka will save money for the cardholder and ask merchantdiscount, and then charge the cardholder a monthly fee. Its business scope has gradually expanded from the initial restaurants to hotels, airlines and other tourism-related industries and general retail stores. With its rich travel experience, AmericanExpress began issuing cards on 1958 and expanded its business scope to areas outside the United States. At this time, sensitive bankers also feel the convenience of credit cards. /kloc-in the 1950s, nearly 100 banks joined the ranks of issuing cards. However, due to the limited business volume, they were confined to the local area and did not charge annual fees to cardholders, making ends meet. A number of banks have withdrawn one after another, and only small and medium-sized financial institutions survive on the edge of profits. These surviving banks began to seek innovation and change. For example, Bank of America in Los Angeles, 1959 began to promote credit cards throughout California; The First National Bank of San Jose, also located in California, was computerized in the same year. During this period, the bank also provides a revolving credit payment method, which makes cardholders pay more flexibly and the bank has more interest income. Later, cardholders gradually got used to using revolving credit, and the development of bank credit cards began to flourish.