Huaneng Power International, Inc., together with its subsidiaries, generates and sells electricity and heat to the regional or provincial grid companies in the People's Republic of China and internationally. It is involved in the development, investment, construction, operation, and management of power plants and related projects; and generation, wholesale, and retail of power and other relating utilities. The company generates power from gas turbine, hydro, wind, photovoltaic, biomass, coal, solar, and oil resources. It is also involved in the sale of coal ash and lime; provision of cargo loading and storage, port, warehousing, and conveying services; photovoltaic power generation projects development and construction; and provision of thermal energy and cold energy services, as well as thermal heating services. In addition, the company engages in the repair of power equipment; provision of water supply and transportation services; construction and operation of electricity distribution networks and heating pipe networks; energy supply, energy transmission, and substation project contracting activities; cargo transportation; and port management, investment, and development activities. Further, it is involved in the management of industrial water and waste, as well as provides environment engineering, and information technology and management consulting services. Additionally, it sells raw and processed coal; and provides central heat, and plumbing and pipe installation services, as well as desalinated water. As of April 27, 2021, the company had a controlled generating capacity of 113,805 megawatts and an equity-based installed capacity of 99,570 megawatts. Huaneng Power International, Inc. was incorporated in 1994 and is based in Beijing, the People's Republic of China.