长海股份：公司主营业务聚焦于高性能玻纤材料的研发、生产与销售

Core Viewpoint - Changhai Co., Ltd. (300196) emphasizes its focus on high-performance fiberglass materials, which are crucial lightweight materials in modern industries, particularly in transportation and renewable energy sectors [1] Group 1: Company Overview - The company specializes in the research, production, and sales of high-performance fiberglass materials, positioning itself at the upstream of the industry chain [1] - The company does not engage in the manufacturing of downstream composite materials or terminal products [1] Group 2: Industry Context - Fiberglass composite materials are widely used in various applications, highlighting their importance in modern industrial processes [1] - There are numerous processing and manufacturing steps between fiberglass products and their end-use applications [1]