国际铜夜盘收跌0.55%，沪铜收跌0.41%

Group 1 - International copper futures fell by 0.55% in the night session, while Shanghai copper dropped by 0.41% [1] - Shanghai aluminum decreased by 0.17%, and Shanghai zinc fell by 0.75% [1] - Shanghai lead declined by 0.36%, whereas Shanghai nickel increased by 0.32% [1] Group 2 - Shanghai tin experienced a decrease of 0.36%, while alumina rose by 1.85% in the night session [1] - Stainless steel saw a slight decline of 0.04% [1]