濮阳惠成：公司主要从事顺酐酸酐衍生物、功能材料中间体等精细化学品的研发、生产、销售

Group 1 - The company, Puyang Huicheng, primarily engages in the research, development, production, and sales of anhydride derivatives and functional material intermediates, which are fine chemicals [2] - The products of the company are widely used in various fields, including electronic component packaging materials, electrical equipment insulation materials, wind power, composite materials, and coatings [2] - Functional material intermediates are mainly utilized in the field of organic optoelectronic materials [2]