Banks generally keep transaction records for at least five years, and cardholders can inquire about bank card transaction records for about five years. Online inquiry of transaction records is generally within one year, provided that online banking has been opened. If the inquired bank card transaction record is more than one year, it can't be found online, so you need to go to the counter to inquire.

Transaction bank generally refers to a package of financial services provided by commercial banks around customer transactions. It is a brand-new concept and business model formed on the basis of the original business by integrating the resources of traditional financial services such as supply chain financing, payment and settlement, cash management, fund custody and e-banking channels. Banks are legally established financial institutions engaged in money and credit business. It is the product of the development of commodity currency economy to a certain stage. Banks are divided into central banks, policy banks, commercial banks, investment banks and the World Bank, and their responsibilities are different.

Banks are one of the financial institutions. Banks are divided into central banks, policy banks, commercial banks, investment banks and the World Bank, with different responsibilities. Central Bank: China People's Bank is the central bank of China. Responsibilities: Implement monetary policy, macro-control the national economy, supervise and manage financial institutions and even specialized financial institutions in the financial industry.

Policy banks: including The Export-Import Bank of China, China Agricultural Development Bank and China National Development Bank. Responsibilities: Financial institutions that participate in or guarantee shares, engage in policy financing activities directly or indirectly in specific business areas for non-profit purposes, and serve as tools for the government to develop the economy, promote social progress and conduct macroeconomic management.

Commercial banks: including China Industrial and Commercial Bank, China Agricultural Bank, China Bank, China Construction Bank, China Postal Savings Bank and Bank of Communications. Responsibilities: Financial institutions that act as credit intermediaries through deposits, loans, remittances and savings. Commercial banks are one of the most important financial institutions, and their main business scope includes absorbing public deposits, issuing loans and discounting bills.