The business scope includes general projects: Research and development of emerging energy technologies; Technical services, technical development, technical consultation, technical exchange, technical transfer, and technical promotion; Petroleum and natural gas technical services Labor services (excluding labor dispatch); Installation services for general mechanical equipment; General equipment repair Specialized equipment repair; Electrical equipment repair; Repair of instruments and meters; Manufacturing of power electronic components Sales of power electronic components; Manufacturing of mechanical and electrical equipment Sales of mechanical and electrical equipment; Marine engineering equipment manufacturing Sales of Marine engineering equipment Sales of special labor protection supplies (except for projects that require approval in accordance with the law, business operations are carried out independently based on the business license in accordance with the law)