The first-class card is a full-featured account, with functions such as cash deposits and withdrawals, transfers, financial management, bill payments, etc.; the second-class card is equivalent to a wallet, and its main functions are savings deposits, investment and financial management, and daily Consumption, payment, etc. Class II cards do not support cash deposits and withdrawals, nor transfers to unbound accounts, and there are limits on transfers to Class II card accounts.

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.