Futures is a standardized forward contract, and a forward contract is an agreement to buy an agreed commodity at an agreed price in a specific period in the future. Standardization is to unify all agreed matters into a standard. For example, soybean meal futures m 150 1 is 20 15 years 1 month soybean meal. The soybean meal contract is all 10 ton, and different commodities have different futures contract designs. Mainland futures refer to futures products listed on Dalian Commodity Exchange, Shanghai Commodity Futures Exchange, Zhengzhou Commodity Exchange and CICC. Hong Kong is mainly a variety listed on the Hong Kong Stock Exchange, just like A shares and Hong Kong stocks, but different. Domestic futures households cannot buy or sell Hong Kong futures products.