Generally, funds are sold according to the first-in first-out rule, while some funds are sold according to the last-in first-out rule. Of course, investors can freely choose two redemption methods according to the income status of products and their own capital needs, which are generally clearly stipulated in the fund prospectus. Different funds have different redemption rules, such as the "first-in, first-out" principle of Ying Chao of China Merchants Bank.
It is recommended that you know the trading rules before buying and redeeming funds, so as to better manage the income.