Continuous contract and main contract are two concepts in futures trading. The main contract refers to the futures contract in the month with the largest position and volume in a certain period, and the continuous contract refers to the futures contract entering the delivery month, which will be constantly updated with the delivery of the futures contract.

It should be noted that investors can only trade specific contracts with dates, such as Shanghai Copper 2 1 12, but not the main company of Shanghai Copper. The main contract cannot be traded, and only provides market data for investors.