Before the opening of the market on the same day, investors input the trading price according to the closing price of the previous day and the market forecast of the day, and determine the opening price of the day according to the principle of maximum transaction. This process is called call auction. If there is no transaction price in call auction, the first transaction price after call auction is the opening price, and the previous transaction price is the closing price of the previous trading day.

The call auction of Shanghai, Dalian and Zhengzhou Commodity Futures Exchanges will be opened within 5 minutes before the opening of each trading day, in which 8: 55-8: 59 is the time for filing orders for futures contracts and 8: 59-9: 00 is the time for call auction to match.

Every trading day in CICC is 9: 10-9: 14, and the futures contract is put on hold at 9: 14-9: 15, so call auction's matchmaking time is late.