国晟科技：公司主营业务包括大尺寸高效异质结（HJT）光伏电池的研发、生产、销售

Core Viewpoint - The company, Guosheng Technology (603778), focuses on the research, production, and sales of large-size high-efficiency heterojunction (HJT) photovoltaic cells and components, indicating a strong commitment to renewable energy solutions [1] Group 1: Business Overview - The main business activities of the company include the development, production, and sales of HJT photovoltaic cells, as well as the production and sales of components such as HJT, TOPCON, and PERC [1] - HJT components are primarily used in various applications including centralized power plants, distributed power plants, and rooftop power plants [1] Group 2: Industry Collaboration - Currently, the company's photovoltaic product business does not involve the aerospace satellite sector and has not engaged in collaboration with aerospace technology groups such as China Aerospace Science and Technology Corporation (000901) [1]