Unless otherwise stipulated by the China Securities Regulatory Commission, domestic institutional investor funds may not engage in the following acts: ① purchase real estate. ② Purchase real estate mortgage. (3) Purchasing precious metals or documents representing precious metals. 4 buy physical goods. ⑤ Borrow cash except for temporary purposes such as redemption and transaction liquidation. The proportion of cash borrowed for this temporary purpose shall not exceed 10% of the net asset value of the fund or collective plan. ⑥ Use financing to purchase securities, except for investing in financial derivatives. ⑦ Do not hold basic assets to participate in short selling. Engaged in securities underwriting business. Pet-name ruby other acts prohibited by the China Securities Regulatory Commission.