The registered address of the peri-change environmental science and technology company ltd. Is located in the village of mok yi, kauri, poo-chou city, hebei province. The registered body is the market monitoring authority of the peri-city, represented by a legal person, linfan, and operates under the auspices of the environmental technology promotion service. Disposers and accessories, gas purification equipment and accessories, gas filtering equipment and accessories are developed, produced and sold; ventilation pipes, axes and accessories, gears, speed-reducing machines, electrical equipment and accessories, pumps, distribution tanks, distribution cabinets are manufactured and sold; castings are sold; mechanical processing** (the projects are subject to approval by the relevant authorities, as required by law) are allowed to operate. (b) general operating projects, which may operate autonomously in accordance with the law)