Production, sales, installation, and maintenance of vehicle automatic washing equipment, spray dust removal equipment, disinfection equipment, water supply equipment, power distribution control equipment, metal products, environmental protection equipment, mechanical equipment, automation control system devices, and digital standard weighing instruments; sales: steel, hardware and labor protection products, plumbing fittings, water pumps, electromechanical products, electronic products, office equipment, communication equipment, wires and cables, traffic facilities, textile products; network technology and software development and services; mechanical equipment leasing; general cargo transportation; agricultural leisure and sightseeing; construction labor subcontracting; construction and installation engineering construction; foundation and groundwork engineering; earthwork engineering; landscaping engineering; steel structure engineering; water and electrical installation engineering.