You can apply for trading at any time, but it is best to sell the fund before three o'clock on the trading day. If the fund is bought and sold before three o'clock on the trading day, the share will be confirmed on the second trading day.
If the Fund trades before 3 pm on the trading day, the Fund will confirm its share on the second trading day; if it trades after 3 pm on the trading day, the Fund will confirm its share on the third trading day.