华海诚科(688535.SH)：公司专注于半导体封装材料的研发和生产

Group 1 - The company, Huahai Chengke (688535.SH), focuses on the research and production of semiconductor packaging materials [1] - The current product system mainly includes epoxy molding compounds and electronic adhesives [1] - These materials are widely used in semiconductor and integrated circuit packaging applications [1]