On July 19, the majority of metal futures markets closed on a positive note, with international copper advancing 1.09% in overnight trading. Specifically, Shanghai copper gained 0.93%, Shanghai aluminum increased by 1.29%, Shanghai zinc surged 2.60%, Shanghai lead rose 0.98%, Shanghai nickel climbed 1.02%, and Shanghai tin edged up slightly by 0.37%. Notably, alumina exhibited robust performance during the overnight session, closing with a remarkable gain of 6.85%. Aluminum alloy also appreciated by 1.18%, while stainless steel added 0.82% in overnight trading.