Manufacturing & Sales: Steel structures, color steel tiles, color steel composite panels, thermal and sound insulation materials (excluding fireproof sealing materials), aluminum-plastic windows and doors, wood, billboards; Contracting: Steel structure projects, anti-corrosion and thermal insulation projects, building waterproofing projects, civil engineering projects, construction installation projects, greenhouse projects, architectural decoration projects, water conservancy projects, earthwork projects, landscaping projects, municipal road projects, bridge projects; Manufacturing, Sales, and Installation: Metal windows and doors, light steel studs; Manufacturing and Sales: Metal-faced mineral wool sandwich panels, steel plate for construction use; Sales: Steel, building materials, metal packaging containers, hardware products; Construction fence loading and unloading; Operation and leasing of construction machinery and equipment; Operation of import and export of goods and technologies within the scope permitted by the state. (As required by relevant regulations, ...)