港股开盘，恒生指数开跌0.36%，恒生科技指数开跌0.48%；上市首日，大众口腔(02651.HK)涨20%，蓝思科技(06613.HK)涨超3%；有色金属概念走强，中国大治有色金属(00661.HK)涨超13%，特朗普表示铜关税将达到50%。

Group 1 - The Hang Seng Index opened down 0.36% and the Hang Seng Tech Index opened down 0.48% [1] - On its first trading day, Da Zhong Kou Qiang (02651.HK) rose by 20%, while Lens Technology (06613.HK) increased by over 3% [1] - The non-ferrous metal sector showed strength, with China Dazhi Nonferrous Metals (00661.HK) rising by over 13% following Trump's announcement that copper tariffs would reach 50% [1]