Sales of plastic products, wire and cable, communication equipment, steel, instruments and meters, electronic components, office equipment, metal materials, power equipment, general machinery and equipment, chemical equipment and products (excluding flammable, explosive, hazardous chemicals, and precursors to drugs), mining equipment and accessories, railway equipment and accessories; recovery and sales of production waste metal, non-production waste metal, and non-metallic renewable resources; design and construction of building construction projects, interior and exterior decoration projects, building demolition projects (excluding blasting), earthwork projects, landscaping projects, and road projects; garbage removal, cargo storage, and general cargo transportation.