Engages in the production and sale of: water treatment equipment, electric boilers, energy-saving boilers, integrated sewage treatment units, fiberglass septic tanks, intercepting oil-water separator and recovery systems, water supply and drainage equipment, water supply systems, pure water systems, drinking water systems, energy-saving and environmental protection equipment, swimming pool water treatment equipment, sewage treatment equipment, reclaimed water reuse equipment, electrical automation equipment, fire protection equipment, refrigeration equipment, electrical control equipment, stainless steel water tanks, fiberglass water tanks, plastic water tanks, disinfection equipment, filling equipment, air purification equipment; pipeline installation; import and export of goods or technology (excluding goods and technologies prohibited by the state or involving administrative approval for import and export); engineering equipment installation and construction, rural toilet renovation; manufacturing of rainwater collection and treatment equipment; pipeline engineering, boiler installation, on-site pipeline maintenance; distribution of water treatment filters, consumables, pumps, scale inhibitors, reverse osmosis membranes, instruments and meters, boilers, valves, inverters, fans, hardware and electrical appliances (excluding wireless microphones), plastic containers, building materials, steel, water treatment materials and accessories, plumbing fittings, insulation equipment.