General aviation services; food sales; bonded logistics center operation. General items: technical services, technology development, technical consultation, technology exchange, technology transfer, technology promotion; IoT technology research and development; computer software and hardware and auxiliary equipment wholesale; software development; internet sales (excluding products requiring sales permits); intelligent unmanned aerial vehicle manufacturing; intelligent unmanned aerial vehicle sales; intelligent vehicle-mounted equipment manufacturing; new energy original equipment manufacturing; integrated circuit chip and product manufacturing; information system integration services; servo control mechanism manufacturing; natural science research and experimental development; artificial intelligence hardware sales; international freight forwarding; road freight transport of ordinary trucks with a total mass of 4.5 tons or less (excluding online freight and dangerous goods); import and export of goods; import and export of technology; mechanical equipment leasing.