The business scope of Jining Changhong Engineering Machinery Co., Ltd. includes engineering machinery maintenance and technical consulting services; Retail of construction machinery and accessories, steel, plumbing, building materials, hardware and electrical equipment, and chemical products (excluding dangerous goods); Production, processing and sales of industrial and mining machinery parts; The import and export business of goods or technology, except for goods and technology that are restricted or prohibited by the state from being operated by the company. Projects that require approval by law can only be operated after approval by relevant departments.