濮阳惠成(300481.SZ)：不生产四甲基环丁烷二酸酐

Core Viewpoint - Puyang Huicheng (300481.SZ) does not produce tetramethylcyclobutane dianhydride and primarily focuses on the research, development, production, and sales of maleic anhydride derivatives and functional material intermediates [1] Group 1 - The company’s products are widely used in various fields including electronic component packaging materials, electrical equipment insulation materials, wind power, composite materials, and coatings [1]