Graded funds can be subscribed or redeemed by on-site and off-site means. On-site purchase, subscription and redemption are carried out through securities companies qualified for fund consignment business in Shenzhen Stock Exchange. Over-the-counter subscription, subscription and redemption can be handled through the business place where the fund manager's direct selling agency or consignment agency handles the fund sales business, or through other means provided by the fund manager's direct selling agency or consignment agency. After the two types of shares of graded funds are listed, investors can trade through securities companies. The standard of whether the perpetual Class A share is worth buying is implied rate of return, and the standard of Class A with term is expected rate of return; The criteria for whether Class B is worth buying are the volatility of the index tracked by the parent fund, the size of price leverage and the size of trading volume (liquidity).

Graded funds, also known as "structured funds", refer to the types of funds that show two-level (or multi-level) risk-return performance with a certain differentiated fund share by decomposing the fund income or net assets under a portfolio. Its main feature is to divide the fund products into two or more types of shares and give different income distribution respectively. The sum of the products of the net value of each sub-fund of the graded fund and the share ratio is equal to the net value of the parent fund. For example, the net value of the parent fund split into two types of shares = the net value of class A sub-base X A share%+the net value of class B sub-base X B share%. If the parent fund is not split, it is a general fund.