Exterior thermal insulation and decorative engineering, thermal insulation and corrosion prevention engineering, wall thermal insulation engineering, architectural decoration and renovation engineering, electrical and water engineering, landscaping engineering, and environmental protection engineering design and construction; sales and installation of thermal insulation and corrosion prevention materials, waterproofing materials, rubber and plastic products; sales of thermal insulation materials, fireproofing materials, asbestos products, architectural decoration materials, plumbing and heating equipment, hardware and electrical appliances, wires and cables, instruments and meters, electromechanical equipment, packaging materials, electronic products, household appliances, furniture, daily necessities, office supplies, and chemical materials (excluding flammable and explosive hazardous chemicals); sales of goods and technology (excluding projects subject to national restrictions or bans), including online sales; and subcontracting of construction labor engineering.