General contracting of building engineering construction Grade I; general contracting of municipal public engineering construction Grade I; specialized contracting of steel structure engineering Grade I; specialized contracting of building mechanical and electrical installation engineering Grade I; specialized contracting of building decoration engineering Grade I; specialized contracting of hoisting equipment installation engineering Grade I; specialized contracting of fire protection facilities engineering Grade I; specialized contracting of ancient building engineering Grade II; specialized contracting of formwork and scaffolding engineering, no grade classification; specialized construction of lightning protection engineering Grade B; sales of steel, hardware, building and decorative materials (excluding hazardous chemicals), chemical products (excluding hazardous chemicals), ceramic products; leasing of building materials, construction equipment, and hoisting equipment; site and housing leasing; general freight
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