Research and development, production, sales, maintenance, and leasing of electronic products, communication equipment, electromechanical equipment, electrical equipment, power equipment, optoelectronic equipment, instruments and meters, computer hardware and software; project design, construction, and services for computer system integration engineering, electronic system engineering, building intelligent system engineering, lightning protection system engineering, electromechanical equipment installation engineering, urban road lighting engineering; design, production, installation, commissioning, maintenance, and sales of safety protection products and tools; sales and services of auto parts, auto components, instruments and meters, electronic components, electrical materials, metal materials, building materials, chemical raw materials (excluding hazardous chemicals), hardware and electrical appliances; technology consulting, technology services, and technology transfer for power equipment and electrical testing; self-operated and agent import and export of various commodities and technologies (excluding those restricted or prohibited by the state); research and development, production, and sales of special power vehicles and power testing special vehicles; leasing of self-owned houses. General items: Sales of household appliances; centralized fast charging stations; sales of charging piles; sales agency; sales of new energy vehicle battery swap equipment; operation of electric vehicle charging infrastructure; battery manufacturing; battery sales.