Depending on the type of fund you buy, if it is a money fund, the principal and interest will be about 3 180-3200 yuan after three years, and if it is a bond fund, it will be about 3400-3600 yuan. If it is a hybrid fund and an equity fund, it depends on the operating point of the market after three years. If it is operated at a low level, there may be little profit or loss. If you encounter a big bull market, the index will run at a high level and the income will be flat.