Manufacturing, modification, repair, and sales of special vehicles, new energy vehicles, clean energy vehicles (including CNG/LNG), ordinary vehicles, and engineering machinery; manufacturing, repair, and sales of drilling and production equipment and supporting facilities (including drilling rigs, water injection pumps, well flushing pumps, fracturing pumps, mud pumps, generator sets, generator rooms, camp rooms, downhole tools, oil pipes); general mechanical processing, repair, and sales; petroleum engineering technical services (including geophysical exploration, drilling, cementing, fracturing, well logging, oil testing, gas testing, downhole operations, major and minor repairs of oil and gas wells, equipment repair and maintenance, oilfield construction, oil and gas pipeline construction); road ordinary cargo transportation; waste material recycling, renewable resource utilization; sales of wires and cables; manufacturing and sales of instruments and meters; production, repair, and sales of oil pumps; manufacturing, repair, and sales of electrical, pneumatic, and hydraulic components and control systems; technical development, technology transfer, technical consultation, and technical services in the field of computer information technology; research and development, sales, leasing, and wholesale of low-altitude aircraft and drones; enterprise management consulting; exhibition planning; sales of pesticides; import and export business (excluding commodities and technologies restricted or prohibited by the state). Involving licensed operation projects, they shall be operated after obtaining permission from relevant departments.