Time limit. Huaan Wealth Management Yueyuehong is a collection of wealth management products issued by brokers, which is different from funds. Different from the extensive sales channels in Public Offering of Fund, collective wealth management products can only be purchased from banks and their brokerage business departments. Compared with Public Offering of Fund, the liquidity of securities firms' collective wealth management products is much worse. Open-end funds can be purchased and redeemed at any time, and the purchase and redemption cycle is generally 2 ~ 3 working days, which is easy to realize. Generally speaking, after the closed period of several months to one year, the securities firms will only be open for a short period of time, and the time is relatively limited, usually 3 to 5 working days per month. Investors can only participate or withdraw during the opening period, and cannot trade at other times.