Yesterday's closing price is yesterday's closing price, which is the final closing price, which is the latest closing price. Yesterday's settlement is yesterday's settlement price. At present, the daily settlement price of commodity futures in China is the weighted average price according to the daily transaction price and trading volume of futures contracts. If there is no transaction price on that day, the settlement price of the previous trading day shall be taken as the settlement price of that day, while the settlement price of the Shanghai and Shenzhen 300 simulated stock index futures refers to the weighted average price of the transaction price in the last hour of a futures contract according to the volume. If there is no transaction in the last hour of the contract, the weighted average price of the transaction price in the previous hour is the settlement price of the day. If there is still no deal during this period, push it forward for another hour. And so on. If the last transaction on the day of the contract is less than one hour away from the opening time, the weighted average price of the whole day's trading volume shall be taken as the settlement price of the day.