Generated by collective bidding.

The opening call auction is conducted within 5 minutes before the market opens on each trading day. The first 4 minutes are the time for reporting buy and sell orders for futures contracts, and the last 1 minute is the call auction matching time. When the market opens, opening price. If the call auction does not produce a transaction price, the first transaction price after the call auction will be the opening price.

Pricing is generally affected by the main contract.