The fund prospectus is one of the most basic and important documents for investors to understand the fund, and it is a must-read document before investing. Because the subscription of open-end funds is a continuous process, many factors related to funds may change during this process, so the prospectus (prospectus) must be updated regularly. Usually, the fund contract is updated once every six months from the effective date and announced within 45 days after the end of six months. The updated content expires on the last day of six months.