Banks are one of the financial institutions. Banks are divided into types: central banks, policy banks, commercial banks, investment banks, and the World Bank. Their responsibilities are different.
Central Bank: The People's Bank of China is the central bank of our country. Responsibilities: A special financial institution that implements monetary policy, conducts macro-control of the national economy, and supervises financial institutions and even the financial industry.

Policy banks: including the Export-Import Bank of China, Agricultural Development Bank of China, and China Development Bank. Responsibilities: Equity participation or guarantee, not for profit, specifically to implement and cooperate with the government's social and economic policies or intentions, directly or indirectly engage in policy financing activities in specific business fields, and serve as a role for the government to develop the economy and promote social progress , financial institutions that carry out macroeconomic management tools.
Commercial banks: including Industrial and Commercial Bank of China, Agricultural Bank of China, Bank of China, China Construction Bank, Postal Savings Bank of China, Bank of Communications, etc. Responsibilities: Financial institutions that act as credit intermediaries through deposits, loans, exchanges, savings and other businesses. A commercial bank is one of the financial institutions, and it is the most important financial institution. Its main business scope includes absorbing deposits from the public, granting loans, and handling bill discounts.
Investment banks: including Goldman Sachs, Morgan Stanley, Citigroup, Wells Fargo, Societe Generale, etc. Responsibilities: Non-bank financial institutions engaged in securities issuance, underwriting, trading, corporate restructuring, mergers and acquisitions, investment analysis, venture capital, project financing and other businesses
World Bank: used to finance countries to overcome poverty, each institution plays a unique role in the mission of alleviating poverty and improving living standards.