Engineering and technical research and experimental development; Information consulting services (excluding licensing information consulting services); Energy saving management services; New material technology promotion service; Research and development of resource recycling technology; Research and development of mechanical equipment; Electrical machinery and equipment sales; Mechanical equipment sales; Sales of electronic special equipment; Sales of new energy vehicle production and testing equipment; Sales of special packaging equipment; Conference and exhibition services; Operating e-commerce; Internet equipment sales; Digital cultural and creative content application services; Sales of household audio-visual equipment; Artificial intelligence hardware sales; New energy original equipment sales; Sales agent; Charging pile sales; Sales of intelligent basic manufacturing equipment; Mold sales; Intelligent storage equipment sales; Software sales; Sales of electrical accessories (except for the items that need to be approved according to law, independent business activities shall be carried out according to law with business license); Import and export of goods and technology.