Yes, the trading time of the fund closes at 3 o'clock, so the closing price of the fund is at 3 o'clock. It should be noted that the fund price of the day will not be updated until the second trading day, so the price seen by investors is the closing price of the previous trading day.
Investors can look at the estimated net value to understand the fund price of the day, but the final price of the fund should be based on the final published net value, and the net value of the fund is generally updated at 24 o'clock in the evening.