Whether OTC funds can buy on the market depends on whether OTC funds have on-market trading methods (such as LOF funds). If there is, you can buy it at the venue; If not, you can't buy it at the venue. You can consult the corresponding fund company.

On-site fund: On-site is the stock market, which is the secondary market. Closed-end funds and ETF funds can only be purchased in the market (for large investors, ETFs can be purchased in the "primary" market), that is, they can only be purchased in the stock market. LOF funds can be purchased on site.