The natural day between fund trading reaches seven days. Fund transaction rates are divided into two types: T+ 1 day confirmation and T+2/day confirmation (T+ 1 day): the fund company shall confirm it on the day after submitting the transaction application (t day). That is, buy before 3 pm on a trading day, and the next trading day is the purchase confirmation date; Sold before 3 pm on a trading day, and the next trading day is the redemption confirmation date. QDII fund is a fund whose transaction is confirmed on T+2, that is, it is bought before 3 pm on a certain trading day, and the next trading day is the subscription confirmation date; Sold before 3 pm on a trading day, and the next trading day is the redemption confirmation date. Whether the fund is confirmed on T+ 1 day or T+2, the seven days of holding the fund are counted as the first day from the date of confirmation of fund subscription, and then counted as the natural day before the date of confirmation of fund redemption, totaling seven days.