It is the law of the market that funds rise in the first half of the year and fall in the second half. The law of the fund market is that it rises in the first half of each year and falls in the second half. Therefore, as long as we grasp this rule, we should sell the fund before 10 every year to gain income, and add positions on dips at the end of each year, or make a fixed investment in June the following year and redeem it before 10 the following year.