南京聚隆：控股子公司聚隆复材专注于先进复合材料应用的研发与生产制造

Group 1 - The company Nanjing Julong (300644) focuses on the research and production of advanced composite materials through its subsidiary Julong Composite Materials [1] - The main business of the company includes carbon fiber composite structural components and parts, as well as complete machine assembly [1] - Currently, the primary application of the company's products is in the drone sector [1]