R&D, processing, sales, installation and technical services of environmental protection equipment, slaughtering equipment and sewage treatment equipment; R&D, processing, sales, installation and technical services of air pollution control, dust removal and deodorization equipment; R&D, processing, sales, installation and technical services of water purification equipment; construction and technical services of sewage treatment projects, black and odorous water treatment projects, air pollution control projects and water purification projects; processing and sales of agricultural machinery accessories, motorcycle accessories, rubber and plastic products; import and export of goods.