章源钨业：公司生产矿山矿体均为石英脉型黑钨矿，各矿山矿体中除钨金属元素外，主要伴生有锡、铜等金属元素

Group 1 - The company, Zhangyuan Tungsten Industry (002378.SZ), confirmed that its mining operations primarily consist of quartz vein-type black tungsten ore, with associated metals including tin and copper, but no bismuth metal [2]