Zhengzhou Commodity Exchange (ZCE) recently issued a notice, the thermal coal futures 2304 contract related issues announced as follows: trading margin standard is 50%, up or down limit range of 10%. The maximum number of open trades in a single day by non-futures company members or clients is 20 lots. The number of open positions on a single day refers to the sum of the number of open positions bought and sold by non-futures company members or customers on a single futures contract on that day. Actual control the maximum number of daily opening trades of the related account group is executed according to the rule regulated for a single customer. Hedging and market-making trades are not subject to the trading limit on the number of open positions.