If the fund is redeemed on a working day and cannot be revoked after 3 pm, the income of that day can still be enjoyed, but it cannot be enjoyed on the next working day.
If it is a rest day, there is no 3 o'clock limit, and the redemption can be revoked after 3 o'clock, as long as it does not exceed 3 o'clock in the afternoon of the next working day.