The 2583 card maintenance rules refer to:

“2” means that a single consumption should not exceed 20% of the permanent limit of the credit card;

“5” means The amount swiped in a single day should not exceed 50% of the credit card's permanent limit;

"8" means that the limit of each credit card should not be used more than 80% per month;

"3" means The monthly usage limit of each credit card should not be less than 30%.

On February 12, 2015, the 2014 payment system operation report released by the People's Bank of China showed that as of the end of 2014, a total of 4.936 billion bank cards had been issued nationwide, which was higher than the previous year. The year-end growth was 17.13%. Among them, a total of 4.481 billion debit cards and 455 million credit cards were issued. Data show that as of the end of 2014, the average number of bank cards held by people nationwide was 3.64, an increase of 17.04% from the end of the previous year. Among them, the average number of credit cards held per capita was 0.34, an increase of 17.24% from the end of the previous year. The per capita credit card ownership in Beijing and Shanghai is still much higher than the national average, reaching 1.7 and 1.33 respectively.

Bank cards refer to credit payment instruments issued to the public by approved commercial banks (including postal financial institutions) with all or part of the functions of consumer credit, transfer settlement, cash deposits and withdrawals, etc. Bank cards reduce the circulation of cash and checks, allowing banking business to break through the limitations of time and space and undergo fundamental changes. The application of the automatic bank card settlement system has made the dream of a "checkless, cashless society" a reality.