Manufacturing of special production vehicles, modified vehicles, hydraulic and pneumatic power machinery and components, general and special instrument components and devices, generators and generator sets, diving equipment, underwater salvage equipment; Sales of engineering machinery vehicles, general mechanical equipment, water pumps, hydraulic power machinery and components, generator sets, environmental protection equipment, mechanical accessories, flood control and drought relief materials; Processing of mechanical accessories; Automotive parts and accessories manufacturing (excluding automobile engine manufacturing); Environmental protection equipment production; Environmental protection equipment design and development; Electromechanical production and processing; Goods warehousing (excluding hazardous chemicals and monitored items); Emergency rescue management services; Flood control and drainage facility management; Application software development; Software development system integration services; Information system integration services; Mechanical equipment leasing.