Open-end funds can only be purchased or redeemed within the effective time of the trading day. Generally speaking, the trading hours are from 9: 30 am to 3: 00 pm every Monday to Friday. If you buy on the same day, you can also cancel the order within the effective time. Orders can be bought or redeemed automatically before 9: 30, and can be bought or redeemed on the second trading day after 3: 00.