The legal entity is liu jianli and operates on behalf of liu jianli, who works on environmental equipment, dust removal equipment, filtering equipment, the manufacture, processing and sale of purification equipment; the design, development and development of hydraulic stations; the import and export of goods; the export and import of technology; and the sale of: filtration cores, filters, filters, filters, purification equipment, dust removal units, plastic seals, empty press fittings, engineering machinery spare parts, filtering equipment and accessories, valves, hardware accessories, filters, filtering nets, filters, instrumentation forms, rubber products, paper products, filtering materials (subject to the approval of the relevant authorities)*