2. Bank fund business refers to the open-end fund custody business. At present, China's commercial banks set up fund management companies through financial holding companies with banks as the main body to carry out fund business. Open-end fund is a fund with variable issuance amount, and the total number of fund shares (units) can be increased or decreased at any time. Investors can purchase or redeem at the business place designated by the fund manager according to the fund quotation.