Sales of environmental-friendly fillers; manufacturing, processing, and sales of plastic products; manufacturing, R&D, installation, and sales of water treatment equipment, environmental protection equipment, and accessories; design, manufacturing, processing, installation, and sales of dust removal, desulfurization, denitrification equipment, waste leachate equipment, waste gas and wastewater treatment equipment, water feature lighting equipment, electrical control cabinets, and automated control equipment; metal products, fiberglass products, thermal insulation materials, chemical products and raw materials