According to the enterprise data, Shenyang Dunan Equipment Engineering Co., Ltd. was established on 20 13- 10-25, and its business scope includes licensed projects: construction, safety evaluation, architectural engineering design, inspection and testing services, and architectural engineering quality testing (projects that must be approved according to law can only be operated after being approved by relevant departments, and the specific business projects are subject to the approval results).

General projects: general mechanical equipment installation services, loading and unloading, project management services, leasing services (excluding licensed leasing services), mechanical equipment leasing, sales of special machinery for tunnel construction, sales of bearings, gears and transmission parts, processing of mechanical parts, sales of power electronic components, sales of hydraulic power machinery and parts, and maintenance of electronic mechanical equipment (excluding special equipment). Technical service, technical development, technical consultation, technical exchange, technology transfer, technology promotion, information technology consulting service, software development, computer software and hardware and auxiliary equipment wholesale, computer software and hardware and auxiliary equipment retail, information system integration service, computer system service, building cleaning service, professional cleaning, cleaning and disinfection service, construction machinery and equipment leasing, metal structure sales, container leasing service, General cargo storage services (excluding hazardous chemicals and other items that need permission and approval), general equipment repair, metal cutting and processing services, traffic facilities maintenance, and auxiliary railway transportation activities (except for items that must be approved according to law, business activities shall be independently carried out according to law with business licenses).