天银机电：公司的控股子公司天银星际是专业研发生产恒星敏感器的商业公司

Group 1 - The core viewpoint of the article is that Tianyin Electromechanical's subsidiary, Tianyin Interstellar, specializes in the research and production of star sensors and is involved in key domestic aerospace projects such as the Qianfan Constellation [2] - Tianyin Interstellar's star sensor products have been applied in all satellites launched under the Qianfan Constellation project [2]