Development of pipeline transportation engineering technology, application and development of new rubber and plastic materials; Production and sales of rubber and plastic products, nylon products, PTFE products, waterstops, waterproof materials, seals, geotextiles, composite geomembranes, anchor rods, rubber bearings and embedded parts, bridge support, expansion joint, hydraulic components, metal bellows, high pressure hose assembly, metal hose, compensator, rubber and plastic seals, hardware and electrical appliances, steel, machinery processing, mining and petroleum machinery parts, highway and railway infrastructure construction, self-operated import and export business