Licensed Projects: Highway management and maintenance, Roadbed and pavement maintenance work, Construction project construction, Construction project quality inspection, Construction Engineering Design, Special equipment design, Special equipment manufacturing, Installation, modification and repair of special equipment, General contracting of housing construction and municipal infrastructure projects( Projects that require approval according to law, Business activities can only be carried out after approval from relevant departments, The specific business items are subject to the approval results.) General Projects: Undertake the engineering construction business of the head office, Foreign contracting projects, Municipal facilities management, Professional design services, General equipment manufacturing( Excluding special equipment manufacturing), Paint Manufacturing( No hazardous chemicals), Construction machinery manufacturing, Traffic safety、 Controlled special equipment manufacturing, Construction machinery sales, Sales of electrical signal equipment, Concrete structural component sales, Paint sales( No hazardous chemicals), Concrete structural component manufacturing, Steel rolling processing, Highway and water transport engineering testing and inspection services, Engineering and technical services( Planning Management、 Survey、 design、 Except supervision), Electrical equipment sales, Wastewater treatment and recycling, Manufacturing of special equipment for environmental protection,Manufacturing of water pollutant monitoring and detection instruments, Manufacturing of special machinery and equipment for water resources, Manufacturing of metal signs for transportation and public administration, Traffic facility maintenance, Sales of traffic and public management signs, Special equipment manufacturing( Excluding licensed professional equipment manufacturing), Gears and gear reduction、 gearbox manufacturing, Gears and gear reduction、 Transmission Sales, Security system monitoring services, Safety technology prevention system design and construction services, Engineering and technical research and experimental development, Industrial Engineering Design Services, Technical Services、 Technology Development、 Technical Consulting、 Technical Exchange、 Technology Transfer、 Technology Promotion, Professional cleaning、 Cleaning、 Disinfection services, Car trailer、 Call for help、 Tow Removal Service, Lighting fixture manufacturing, Lighting fixture sales, Metal structure sales, Metal structure manufacturing, Import and export of goods, Technology import and export, Import and export agent( Except for projects that require approval according to law, Carry out business activities independently in accordance with the law with a business license)