General items: Hardware products retail, hardware products wholesale, wire mesh making equipments sales; High-performance non-ferrous metal and alloy material sales, construction machinery sales: Construction engineering in mechanical manufacturing: Concrete structural components sales, concrete structure component manufacturing: Building decoration materials sales, mechanical equipment rent goods: Doors and Windows sales, botanical garden afforestation project construction, the import and export agent: Import and export of goods, technology import and export, technical services, technical development, technical advice, technical exchanges, technical Technology transfer, technology promotion, building metal parts sales: Building metal parts manufacturing: Construction machinery and equipment rental, hardware products research and development: Machinery and equipment sales: Machinery and equipment research and development, rental services (excluding licensed rental services), industrial engineering design services; Manufacturing OF SPECIAL TEXTILE EQUIPMENT (EXCEPT FOR THE PROJECTS SUBJECT TO approval according TO law, independently carry out business activities according to law with business license). Licensing projects: Prestressed concrete simply supported beam production of railway Bridges, construction engineering construction, construction engineering design, construction supervision, civil air defense engineering protection equipment sales (subject to approval in accordance with the project, approved by the relevant departments to rear can operate, specific items will be subject to related department approval documents or certificates)