Develop, produce and sell engineering machinery, agricultural machinery, sanitation machinery, truck cranes and their special chassis, fire-fighting vehicles and their special chassis, aerial work machinery, emergency rescue equipment, mining machinery, coal mining machinery and equipment, material conveying equipment, other machinery and equipment, metal and non-metal materials, optical, mechanical and electrical integration high-tech products and provide leasing and after-sales technical services; sell construction and decoration materials, engineering special vehicles and metal materials