A股铜概念股继续强势，精艺股份3连板

Group 1 - The A-share market's copper concept stocks continue to strengthen, with Jingyi Co. achieving three consecutive trading limit increases, and other companies like Baiyin Nonferrous Metals, Jiangxi Copper, and Shengtun Mining also showing significant gains [1] - The China Nonferrous Metals Industry Association's Copper Branch firmly opposes "involution" competition within the copper smelting industry, indicating a push for more sustainable practices [1] - The Grasberg mine in Indonesia, the world's second-largest copper mine, has declared "force majeure" and ceased operations due to a landslide incident, impacting global copper supply [1]