General projects: Internet of Things technology R&D; Hardware product development; Distribution switch control equipment research and development; Research and development of metal products; Software development; Technical service, technology development, technology consultation, technology exchange, technology transfer, technology dissemination; Information technology consulting services; Import and export of goods; Technology import and export; Import and export agent; Metal material sales; Machinery and equipment sales; Domestic trade agency; Metal structure sales; New material technology promotion services; New material technology research and development; Hardware products wholesale; Hardware products retail; Sales of metal products; (All projects do not include physical operation and warehousing services) (except for projects that are subject to approval according to law, independent business activities are carried out according to law with business licenses).