If there is no transaction price in call auction, the opening price is the first transaction price after call auction. The benchmark price of the new listing contract shall be determined by the exchange. The closing price refers to the transaction price generated by call auction within five minutes before the closing of the futures contract. If there is no transaction price in call auction, the closing price shall be the last transaction price before call auction. The settlement price of the day refers to the weighted average price of the transaction price of a futures contract on the day according to the trading volume. If there is no transaction price on that day, the settlement price of the previous trading day shall be the settlement price of that day. How to determine the transaction price: the computer automatic matching system of the exchange sorts the transaction declarations according to the principle of price priority and time priority, and automatically matches the transaction when the buying price is greater than or equal to the selling price.