SMM July 22nd: today, the spot of electrolytic copper in North China quoted a price of 20 to 100 yuan / ton for the contract of that month, with a transaction price of 52480 yuan / ton to 52700 yuan / ton. Overnight gold and silver crude oil rose sharply, leading the base metals to turn red across the board. Copper in Shanghai rebounded by 1.5% and rose by 52600 yuan / ton, an increase of about 700 yuan / ton. Due to the small supply of the smelter price, the upper limit was maintained at 100 yuan / ton, but there was no actual deal. Copper prices went up and down, fearing to stop at high prices, traders offered the price voluntarily, the lower limit rose 20 yuan / ton, and the average price of rising and discounting was 10 yuan / ton lower than yesterday.