On-floor trading refers to trading only in the exchange. All orders are settled through transactions with the exchange, which are conducted according to standard contracts. Over-the-counter trading is a trading activity in the over-the-counter market rather than in the foreign exchange. The main difference between them is that the transaction cost is different. If the lowest transaction price does not exceed. % of the transaction amount, T+ can be sold after buying on-site transactions, and the funds will be received at T+, and can be bought immediately after selling; Over-the-counter transactions are mainly expenses such as subscription and redemption. The trading time is different. On-site trading must comply with the stock trading hours, that is, off-site trading (Monday to Friday) can be conducted at other times outside the stock trading hours (but not at that time). There are different types of funds that can be traded. The main types of funds traded on the floor are: closed-end funds, LOF, ETF and graded funds; The types of funds traded over the counter are mainly open-end funds.