1. There is no limit to the total amount of futures contracts, but when the total amount (positions) reaches different amounts, the margin ratio will gradually increase. With the increase of margin, traders' interest in trading will decrease, thus playing a role in limiting positions.

2. When a new contract (new product or new month) is listed, the exchange will give the benchmark price, based on the average price of the contract in the first three months. On the first trading day of the new contract, the price limit is three times as high as that under normal circumstances (for example, it is 3% under normal circumstances and 9% on the first day of the new contract).

3. Unlimited daily limit means that the volume of each price is very small, and the price is quickly pulled down to the position of daily limit. This shows that most forces are watching more, so few orders are sold, and only a small number of orders are needed to raise the price.