For open-end funds, under normal circumstances, any working day should be able to handle the purchase, conversion, redemption and other businesses for investors. However, when the fund continues to purchase and expand its scale, in order to protect the rights and interests of investors, the fund company can take measures to suspend the subscription conversion business within a certain period of time to control the excessive expansion of the fund scale; Sometimes, fund companies may also take measures to suspend redemption. During the working days during this period, the fund is closed, that is, the business of subscription, conversion and redemption is suspended. On other working days, when the fund is open, it can handle subscription, conversion and redemption for investors. This working day is an open day.

Regular open days refer to the date from the first working day after the end of each closed period or operation cycle to the end of the open period.