It can be regarded as a form of financing for investors to engage in real estate business activities beyond their own funds and management capabilities. Real estate investment funds raise investors' funds by issuing fund securities, and entrust professionals to invest in real estate or pan-real estate mortgage loans, with a long investment period and the pursuit of stable and sustainable income. The income of fund investors is mainly the income of investment rights and interests owned by real estate funds and service fees. Fund managers charge agency fees.