The fixed investment of the fund needs regular attention. When the index valuation is relatively low, you can invest more money, and when the valuation becomes higher, you can invest less. If you don't look at the valuation, just pay attention to the Shanghai Composite Index. You can make a fixed investment without thinking below 3000 points, and stick to it from 3000 to 4500 points, but the amount of fixed investment should be reduced. From 4500 to 6000, stop making profits immediately. Do not hesitate!