In the venture capital industry, it refers to investing in venture enterprises that have grown to the expansion stage and have not yet made profits, but still need a lot of money to expand. Mezzanine investment, also known as mezzanine investment, comes from English mezzanine, which originally meant a half-story building between the first floor and the second floor. In terms of investment, mezzanine investment refers to an investment type that is between equity investment and debt investment and flexibly combines their advantages. Mezzanine investment often appears in some venture enterprises that have grown to the expansion stage and have not yet started to make profits, but still need a lot of money to expand.