Yes, you can buy the fund manually, and there is no conflict between fixed investment and buying. When the fixed investment fund loses money, investors can buy it manually to reduce the cost. The lower the cost, the less risk investors take. If the fixed investment fund is profitable, investors can also sell it manually for profit.

Investors can set a target buying point (specific to investors). If the fund loses 10%, it will start to buy a third, and then it will fall 10% to buy a third for the second time, and so on.