Time for fund managers to change positions: it is not fixed and cannot be generalized. In normal operation, the fund manager will adjust the position irregularly according to the specific situation, and the mode is not fixed. However, the fund manager will announce the ownership structure, positions and fund shares once every three months or so. Fund managers generally require a master's degree or above in finance-related major, with a good mathematical foundation and a solid economic theory foundation. They will be more competitive if they have overseas study experience or have obtained CFA certificate. Each fund is decided by a manager or a group of managers, and the investment portfolio conforms to the fund specifications.