Licensed Projects: Various engineering construction activities, Road freight transport( Does not contain dangerous goods), Construction Engineering Design,Tap water production and supply, Dangerous chemical operations, refined oil wholesale( Restricted hazardous chemicals), Fertilizer production( 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: Bidding agency services, Mechanical parts、 Parts processing, Machinery and equipment rental, General cargo warehousing services( Does not contain hazardous chemicals or other items that require licensing and approval), Heat production and supply, Machinery and equipment sales,Chemical product sales( Does not contain permitted chemical products), Building materials sales, Engineering and technical services( Planning Management、 Survey、 design、 Except supervision), Technical Services、 Technology Development、 Technical Consulting、 Technical Exchange、 Technology Transfer、 Technology Promotion, Professional cleaning、 Cleaning、 Disinfection services, Oil and gas technical services, Specialty chemical product sales( No hazardous chemicals),Specialty chemical product manufacturing( No hazardous chemicals), Sales of labor protection products, Sales of industrial textile products, electric wire、 Cable Operations, Valves and plugs sales, Hardware wholesale, Hardware product retail, Metal tool sales, Pump and vacuum equipment sales, Rubber product sales, Digital video surveillance system sales, Electronics sales, Petroleum product sales( No hazardous chemicals), Fertilizer sales, Sales of engineering plastics and synthetic resins, Manufacturing of special equipment for oil drilling, Sales of special equipment for oil drilling, Mechanical equipment research and development, Special equipment repair, Rental Services( No licensed rental services), Import and export of goods, Fertilizer sales( Except for projects that require approval according to law, Carry out business activities independently in accordance with the law with a business license)