The futures contract code: Shanghai Copper 0705, generally marked as CU0705, is preceded by the commodity type and followed by the delivery date, that is, the Shanghai Copper futures contract delivered in May 2007. Their prices are different because they are contracts delivered at different times. Of course, the contract price for delivery in different periods will be different. This is the futures price, not the spot price. Futures and spot prices are not necessarily synchronized. It only has the significance of reaching the spot price, but