Installation, maintenance, and testing of power facilities; Various engineering construction activities; Power generation, transmission, and supply business; Construction engineering survey; Construction engineering design; General contracting of housing construction and municipal infrastructure projects; Engineering cost consulting services; Import and export of goods (for projects that require approval according to law, business activities can only be carried out after approval by relevant departments. The specific business projects are subject to the approval results). General items: Sales of intelligent power transmission and distribution and control equipment; Sales of electrical instruments and meters; Sales of electrical equipment; Construction of earthwork engineering; Engineering management services; Technical services, technology development, technology consulting, technology exchange, technology transfer, and technology promotion; Computer system services; Solar power generation technology services (except for projects that require approval according to law, operating activities can be carried out independently based on the business license in accordance with the law)