The change of fund size shows that the fund is an open-end fund, and the total size of the open-end fund is not fixed. In the process of fund operation, investors can purchase and redeem at will. The more purchases, the larger the fund scale.

On the contrary, the scale of closed-end funds is not fixed, and the fund operation period is closed. During the closed period, investors can't apply for redemption, and the fund can only be traded until the regular open day or the fund is listed.