For the evaluation of fund performance, it is not enough to know only the rate of return achieved by investment products. Investors and fund companies also need to know the performance of fund managers relative to the market and their performance relative to other fund managers. Only through a complete investment performance evaluation can investors have enough information to understand their investment situation. Investors can decide whether to continue to use the existing investment manager; Fund management companies can decide whether a fund manager can manage more funds, allocate more resources or need to be replaced. Funds with different investment objectives and scope may have different investment strategies and performance benchmarks, and their performance is not comparable.