1. What is the deposit system? The margin system, also known as the margin system, refers to the system that the market maker stipulates that the buyer or seller who has reached a futures transaction should pay the performance bond when settling each transaction. In futures trading, any trader must pay a certain proportion (usually 5% ~ 10%) of the price of the futures contract he buys and sells as the fund guarantee for his performance of the futures contract, and then he can participate in the futures contract trading and decide whether to add funds according to the price fluctuation. This system is called margin system, and the funds paid are called margin.

2. What is the market maker system? Market maker system is a kind of market transaction system, in which a legal person with certain strength and credibility acts as a market maker, and then constantly provides investors with buying and selling quotations, and investors buy and sell at the offered prices. It is a system different from competitive bidding, and is generally adopted by the "over-the-counter market". With the popularity of the Internet, this counter trading system has also become electronic.

3. What is the difference between continuous quotation transaction and centralized matching transaction? "Continuous quotation transaction" refers to a transaction in which quotations can be bought and sold continuously during the trading time, such as stock trading or foreign exchange trading; "Centralized matchmaking transaction" refers to a one-time transaction of all quotations in the market before the start or end of trading time. For example, the Shenzhen Stock Exchange will suspend the continuous quotation trading within three minutes before the end of 3 pm every day, and only accept the buying and selling quotations, and make a one-time match at 3 pm.