Huaneng Power International, Inc., together with its subsidiaries, engages in the generation and sale of electric power to the regional or provincial grid companies in the People's Republic of China and internationally. It is involved in the development, construction, operation, and management of power plants and related projects. The company also generates power from gas turbine, hydro, wind, photovoltaic, coal-fired, and biomass resources. In addition, it is involved in the sale of coal ash and lime; cargo loading and storage; port, warehousing, and conveying activities; photovoltaic power generation projects development and construction; and provision of thermal energy and cold energy services, as well as thermal heating services. Further, the company engages in the repair and maintenance of power equipment; supply of steam and hot water; plumbing pipe installation and repair; and energy engineering construction activities. Additionally, it is involved in the provision of transportation services; construction and operation of electricity distribution networks and heating pipe networks; energy supply, energy transmission, and substation project contracting activities; cargo handling and transportation; and port management, investment, and development activities. The company engages in the management of industrial water and waste, as well as provides environment engineering, and information technology and management consulting services. It also sells raw and processed coal; and offers central heat and desalinated water services. As of December 31, 2021, the company had a controlled generating capacity of 118,695 megawatts and an equity-based installed capacity of 103,875 megawatts. Huaneng Power International, Inc. was incorporated in 1994 and is based in Beijing, the People's Republic of China.