A notable feature of private equity funds is that fund sponsors and managers must invest their own funds into fund management companies, and the success of fund operation is closely related to their own interests. Judging from the current international practice, fund managers generally hold 3%-5% of the shares of the fund. In case of loss, the shares owned by the manager will be used to pay the participants first. Therefore, the promoters, managers and funds of private equity funds are closely related to each other and share the interests of honor and disgrace.