When both of them opened, domestic copper was basically based on the trend of copper, because the London Futures Exchange reflected a global supply and demand relationship. However, London is closed, and reopening may be based on domestic trends.

There is no absolute relationship between the two prices: 1: 1, because the situation of domestic spot trading market has certain influence on the price of domestic futures. For example, Luntong fell, but the domestic spot price did not fall, and the market also recognized the price. Then the domestic futures price will at least fall less than that of Rentong, that is, the ratio of Rentong to Shanghai Copper.