The fund open day refers to the time for customers to handle a series of procedures such as opening an account, purchasing, redeeming, closing an account, reporting the loss and transferring in an open-end fund. Open days of open-end funds generally do not refer to all working days in a week, but are stipulated by relevant departments and institutions.

During the fund's opening period, the fund can only trade during the trading hours of the fund's trading day. During the period when the fund announces the suspension of subscription, redemption, conversion and fixed investment, the fund cannot trade during the trading hours of the fund's trading day.

Open-end fund refers to the fund whose total share is not fixed and can be purchased or redeemed at the time and place agreed in the fund contract.