Huaneng Power International, Inc. is principally engaged in the investment, construction, operation and management of power plants. The Company鈥檚 electricity generation business covers Northeast China Grid, North China Grid, Northwest China Grid, East China Grid, Central China Grid and South China Grid, as well as grid in Singapore. The Company鈥檚 power plants are mainly located in Shandong province, Liaoning province, Zhejiang province, Guangdong province, Jiangsu province, Hebei province, Fujian province, Jiangxi province, Chongqing city, Gansu province, Beijing city and Shanghai city, among others. As of December 31, 2010, the Company had a wholly owned power operation subsidiary in Singapore.