Zhengzhou Commodity Exchange: cotton, PTA, Shanghai Futures Exchange: copper, aluminum, zinc, natural rubber, the above six kinds of 5 tons per hand; Wheat and sugar are traded in Zhengzhou, soybeans, corn, soybean oil and soybean meal are traded in Dalian Commodity Exchange, and 10 ton fuel oil is traded in Shanghai Futures Exchange.

The margin paid per lot is the price per lot * the margin ratio.