Business scope includes: Manufacturing and selling centrifugal stainless steel composite pipes and centrifugal stainless steel composite plates; Sales of metal materials (excluding precious metals), metal ores, machinery and equipment, instruments and meters, metal products, communication equipment, labor protection supplies, stationery, office equipment, computer software and hardware and auxiliary equipment, wires and cables, bearings, valves and plugs, electronic products, construction materials, refractory materials, waterproof building membrane products, plastic products, automotive parts, and recycled resources; Recycling and sales of production scrap metal.