云南锗业：目前公司外购锗原料主要来自国内

Group 1 - The core viewpoint of the article is that Yunnan Zhenye (002428) primarily sources its raw materials, specifically germanium concentrate, from domestic suppliers, particularly from lead-zinc mining operations where germanium is a byproduct [1] Group 2 - The company indicates that its external procurement of germanium raw materials mainly comes from domestic sources [1]