The opening day for investors to apply for subscription and redemption is the trading day of the stock exchange, and the opening hours are 9: 30 ~1:30, 13: 00 ~ 15: 00. No subscription or redemption of fund shares will be handled outside this time. The fund share purchased and redeemed by investors shall be an integer multiple of the minimum purchase and redemption unit. Generally, the minimum purchase and redemption unit is 500,000 copies or 6,543.8+0,000 copies. Fund managers have the right to make changes, and make an announcement on at least one information disclosure media designated by China Securities Regulatory Commission at least 3 working days before the changes. The subscription and redemption of ETF shares should follow the following principles: ETF subscription and redemption adopt the method of subscription and redemption of shares, that is, both subscription and redemption are applied according to shares. The subscription consideration and redemption consideration of ETF subscription and redemption include portfolio securities, cash substitution, cash difference and other considerations. ③ The application for subscription and redemption shall not be revoked after it is submitted.