REITs is Real Estate Investment Trust, which is the abbreviation of English "real estate investment trust". Internationally, REITs (Real Estate Investment Trust Fund) is a kind of trust fund that collects the funds of a specific majority of investors by issuing income certificates, is managed by specialized investment institutions, and distributes the comprehensive investment income to investors in proportion. In essence, REITs belong to a way of asset securitization. Real estate investment trust funds have two typical modes of operation. One is that SPV issues income certificates to investors, concentrates the raised funds on commercial real estate such as office buildings and shopping malls, and repays the cash flow generated by these operating properties to investors. Secondly, the original property developer packaged some or all of its operating property assets to set up professional REITs, and according to its income, such as annual rent, mortgage interest, etc., it was sold to investors in several shares on average, and then paid dividends regularly, which actually provided investors with a bond-like investment method. In contrast, the cash flow of commercial real estate such as office buildings and shopping malls is far more stable than that of traditional residential real estate. So REITs are generally only applicable to commercial real estate.