Crude oil futures adopt the margin system. The Energy Center formulates different trading margin collection standards according to the different stages of the listing operation of futures contracts (i.e. the new listing date of futures contracts to the last trading day). The specific provisions are as follows:

The one-way margin collection contract is no longer applicable after the close of the fifth trading day before the last trading day.

(a) the position has reached a certain level;

(2) approaching the delivery date;

(3) The cumulative increase or decrease has reached a certain level for several consecutive trading days;

(4) Continuous ups and downs;

(five) in case of national holidays;

(six) the energy center believes that the market risk has changed significantly;

(seven) other circumstances that the Energy Center deems necessary.

For futures contracts with more than two specified trading margin ratios, the trading margin shall be charged according to the highest value.