Yes, every transaction of the fund is calculated according to the closing (off-exchange) net value. For example, investors buy funds at 10 on the morning of the trading day. At this time, the fund fell, but it rose at the close. Then the income of the fund on that day will be calculated, and the principal and income will be automatically transferred to the investor's account after the fund is redeemed.
Fund income = (current fund net value-net value when buying the fund) * fund share-fund handling fee. Fund income does not need to be calculated manually by investors, and will be directly displayed in the investor's account.