上期所沪锡主力合约大跌7% 国际铜主力合约跌超3%

Group 1 - The Shanghai Futures Exchange's main contract for tin experienced a significant drop of 7%, closing at 351,260 yuan per ton [1] - The main contract for international copper on the Shanghai Futures Exchange fell by over 3%, settling at 87,680 yuan per ton [1]