Fly ash aerated concrete blocks and panels research, development, production, sales, and installation; production and sales of mobile buildings; import and export of goods; sales of hardware, building materials, fly ash and its products, decorative materials, electromechanical equipment (excluding passenger vehicles with 9 seats or fewer), chemical products (excluding hazardous and easily produced toxic chemicals), plastic products, kitchen and bathroom appliances, plumbing pipes, metal materials, valves and fittings, switches and sockets, electrical wires and cables, plastic steel windows and doors, door and window profiles, wooden products, cement, ready-mixed concrete, office supplies, and daily necessities.