At present, there are 40 listed varieties in Shanghai, Dalian, Zhengzhou Commodity Futures Exchange and China Financial Exchange (stock index futures) (the wheat contract was changed from hard wheat to ordinary wheat, and the original hard wheat contract was delisted; The trading units of early indica rice and rapeseed oil contracts were revised. The new varieties are glass, rapeseed and rapeseed meal; The new variety is the coking coal of Dashang Institute, and the trading unit of coking coal contract is 60 tons/lot, while the egg variety of Dashang Institute is being examined by the CSRC, and the thermal coal variety of Zhengshang Institute and the pig variety of Dashang Institute are being examined, so the correct statement should be that there are 45 varieties of contracts in the transaction, 1 variety of contracts that have been examined and listed, and 1 variety of contracts that are under discussion. Different varieties have different handling fees. All futures companies are members of exchanges (financial exchanges are not). A fixed part of the customer's fees for participating in futures trading will be paid to the exchange, and the other part will be collected by the futures company. The standard for charging futures companies is to add a part to the futures exchange for its own operation. Different futures companies charge different fees in different regions. Relatively large and powerful futures companies charge higher fees, while some small futures companies charge slightly lower fees. The handling fee will also vary according to the customer's capital size and transaction volume. For customers with a large amount of funds or even millions, futures companies will also moderately reduce the handling fee.