云南锗业：子公司生产的光伏级锗产品为太阳能电池用锗单晶片，主要运用于生产太阳能锗电池生产

Group 1 - The company Yunnan Zhenye (002428.SZ) has products applicable in the space photovoltaic sector, specifically solar-grade germanium products used for solar cell production [2] - The solar germanium batteries produced by the company's subsidiary are characterized by high photoelectric conversion efficiency and stable performance, making them suitable for use in spacecraft such as satellites [2]