The price of electrolytic copper, if quoted by general traders, is based on the latest transaction price of the latest contract in the previous period, and this price is the final price. For example, if you make an inquiry, the latest transaction price of Shanghai Copper 1309 is 53050, with a premium of 100-260. The premium range is because the premium level is determined according to the quality of copper, and the better is higher. If you ask about good copper, say 240, then the final price is 53290.