Differential compensation is usually regarded as a credit enhancement measure, which is used to protect the principal and income of investors or to protect all the private equity income of investors. Looking at the overall situation, this is usually used as a credit enhancement measure to protect the principal and income of investors, or to protect the investment income of private equity funds.

External guarantee refers to the external guarantee issued by domestic institutions (except domestic and foreign financial institutions) in the form of letter of guarantee, standby letter of credit, promissory note and draft. External guarantees include: financing guarantee, financing lease guarantee, guarantee under compensation trade, guarantee in overseas project contracting and other guarantees with foreign debts.