Engages in the production and sale of: water treatment equipment, electric boilers, energy-saving boilers, integrated wastewater treatment units, fiberglass septic tanks, intercepting oil-water separation and recovery systems, water supply and drainage equipment, water supply systems, pure water systems, drinking water systems, energy-saving and environmentally friendly equipment, swimming pool water treatment equipment, wastewater treatment equipment, reclaimed water recycling equipment, electrical automation equipment, fire protection equipment, refrigeration equipment, electrical control equipment, stainless steel water tanks, fiberglass water tanks, plastic water tanks, disinfection equipment, bottling 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 procedures); engineering equipment installation and construction, rural toilet renovation; rainwater collection and treatment equipment manufacturing; 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.