东方电热：生产的钢（铝）塑复合材料等主要用于光缆、电缆的复合钢（铝）塑带

Group 1 - The company, Dongfang Electric Heating, is a leading domestic enterprise in the production of composite steel (aluminum) plastic materials primarily used for optical cables and electrical cables [1] - The company produces composite steel (aluminum) plastic strips, which are essential components in the telecommunications industry [1] - The company responded to investor inquiries on November 19, indicating its strong position in the market for composite materials [1]