General items: Sales of electrical accessories; Mechanical and electrical equipment sales; Distribution switch control equipment sales; Electric wire and cable operation; Metal structure sales; Photovoltaic equipment and components sales; Intelligent transmission and distribution and control equipment sales; Energy storage technology service; Information system integration services; Battery sales; Battery parts sales; Charging pile sales; Engineering and technology research and experimental development; Technical service, technology development, technology consultation, technology exchange, technology transfer, technology popularization; Technology extension services; Non-ferrous metal calendering; Nonferrous metal alloy sales; Nonferrous metal alloy manufacturing; High-performance non-ferrous metal and alloy materials sales; Sales of capacitors and their supporting equipment; Import and export of goods; Technology import and export; Import and export agent (except the items subject to approval according to law, independently carry out business activities according to law with business license)