Development of environmental protection technology; Environmental protection equipment, sewage treatment equipment, air purification equipment, FRP complete series production equipment, FRP sand inclusion pipeline, process pipeline, high-pressure pipeline, reinforced PE pipeline, PVC (PE, PP, HDPE, PCCPL, PCCPE, ductile iron) pipeline (pipe fittings and valves), PVC (PP, PE, FRP) container, tower and composite products, composite anti-collision facilities, composite protection facilities, composite transportation facilities, pultruded profiles, molded products Design, production, sales, installation and after-sales service of grid, cable tray and casing, cooling tower, fan, resin pouring electrolytic tank, steel container, purification tank and biogas digester; Sales of chemical products (excluding dangerous, highly toxic, precursor chemicals, monitored chemicals and inflammable and explosive products) and fiberglass; Oil tank lining transformation and technical services; Construction of anti-corrosion and thermal insulation works; Environmental protection engineering construction and consulting services; R&D, manufacturing, processing and sales of environment-friendly degradable materials and products, plastic products, bio based material sheets and products, and starch based material sheets and products; Import and export of goods or technologies