Research and development of new material technologies; Manufacture of non-metallic mineral products; Sales of non-metallic minerals and products; Manufacture of lightweight building materials; Sales of lightweight building materials; Manufacture of new building materials (excluding hazardous chemicals); Sales of building materials; Sales of cement products; Sales of asbestos cement products; Manufacture of sealing fillers; Sales of sealing fillers; Sales of anti-corrosion materials; Sales of thermal insulation materials; Sales of pigments; Sales of plastic products; Sales of glass fiber reinforced plastic products; Sales of building decoration materials; Engineering and technological research and experimental development; Road freight transport of goods with a total mass of 4.5 tons or less (excluding network freight and dangerous goods); Technical services, technical development, technical consulting, technical exchange, technology transfer, and technology promotion.