Futures, usually futures contracts, are contracts. The spot corresponding to futures contracts can be commodities, such as copper or crude oil, financial instruments, such as foreign exchange and bonds, or financial indicators. Futures trading rules can be divided into broad sense and narrow sense, and broad sense includes all laws, regulations, articles of association and rules of futures market management. In a narrow sense, it only refers to the futures trading rules formulated by the futures exchange and approved by the state regulatory authorities, as well as various detailed rules, measures and regulations based on this. First, the margin rule means that in futures trading, any trader must pay the margin according to a certain proportion (usually 5%- 10%) of the value of the futures contracts he buys and sells for settlement and performance guarantee. Second, there are no debt settlement rules on that day. After the daily trading, the Exchange will settle the profit and loss, trading margin, handling fees, taxes and other expenses of all contracts according to the settlement price of the day, and transfer accounts receivable and accounts payable at the same time, so as to increase or decrease the settlement reserve of members accordingly. Third, the price limit rule, also known as the daily maximum price fluctuation limit, means that the trading price fluctuation of futures contracts in a trading day shall not be higher or lower than the prescribed price limit, and the quotation exceeding the price limit will be regarded as invalid and cannot be traded. Four, the position limit rules, the position limit system refers to the maximum number of speculative positions that members or customers can hold in a contract according to the provisions of the exchange. Fifthly, the declaration system of large households is another system closely related to the position limit system, in order to prevent large households from manipulating market prices and controlling market risks. 6. Delivery rules. Delivery refers to the process that when a contract expires, both parties transfer the ownership of the subject matter contained in the contract according to the rules and procedures of the futures exchange, or settle the cash difference according to the agreed settlement price, and settle the contract at the end of the period. 7. The compulsory liquidation rule refers to the compulsory liquidation measures taken by the exchange for relevant positions when members and investors violate the rules. 8. The risk reserve rule refers to the system that provides financial guarantee to maintain the normal operation of the futures market and make up for the losses caused by unforeseen risks. 9. Information disclosure rules refer to the system in which futures exchanges regularly publish information related to futures trading according to relevant regulations.