Natural science research and experimental development; engineering and technological research and experimental development; oil and gas technical services; engineering technical services (excluding planning management, survey, design, supervision); technical services, technology development, technical consultation, technical exchange, technology transfer, technology promotion; new material technology research and development; new material technology promotion services; contract energy management; energy-saving management services; information consulting services (excluding licensed information consulting services); labor services (excluding labor dispatch); special chemical product manufacturing (excluding hazardous chemicals); special chemical product sales (excluding hazardous chemicals); chemical product sales (excluding licensed chemical products); petroleum product sales (excluding hazardous chemicals); mechanical equipment sales; oil drilling special equipment sales; electrical equipment sales; metal product sales; non-metallic mineral product sales; metal material sales; metal ore sales; building materials sales; instrument sales; experimental analysis instrument sales; sales agency; import and export of goods; technology import and export; mechanical equipment leasing; office equipment leasing services; transportation equipment leasing services; road cargo transportation for general freight vehicles with total mass of 4.5 tons and below (excluding online freight and dangerous goods). Permitted items: Inspection and testing services.