Scope of business, communication Tower, power tower, navigation tower, sight-seeing tower, metal structure, power equipment, broadcasting and television tower, boiler auxiliary equipment (excluding special equipment), design, manufacture, installation, debugging and maintenance of common mechanical equipment, machinery parts, metal parts (excluding precious metals), metallurgical equipment parts design, processing, sales, housing repair, sports facilities installation, construction services subcontracting, construction Engineering, landscaping engineering, municipal engineering, heat preservation engineering construction, indoor and outdoor decoration, network engineering construction (not engaged in internet information services and value-added telecommunications business), wholesale, retail: Steel, building materials, decorative materials, hardware, electrical, computer supplies, furniture, wood. Projects subject to approval in accordance with the law shall be approved by the relevant departments before starting business activities