Corporate finance refers to financial enterprises. Interbank finance refers to financial institutions, including policy banks, national commercial banks, foreign banks, local commercial banks and financial enterprises. Refers to enterprises that need to obtain financial business licenses granted by financial supervision departments, including postal savings banks, state-owned commercial banks, joint-stock commercial banks, trust and investment companies, financial asset management companies, financial leasing companies and some financial companies that need to obtain banking business licenses. Securities companies, futures companies and fund management companies that need to obtain securities business licenses to practice; All kinds of insurance companies that need to obtain insurance business licenses. Securities companies, fund management companies, insurance companies, trust and investment companies, enterprise group finance companies, credit cooperatives, guarantee companies and social insurance institutions at all levels. To establish a multi-level cooperative relationship, take inter-bank financing as a link, extend all kinds of assets, liabilities and intermediary business in the financial product chain, and provide a series of products and services including interest-bearing deposits, bill discount, credit asset transfer and so on.