Huaneng Power International, Inc. (Huaneng Power) is an independent power producer. The principal activities of the Company are investment, construction, operation and management of power plants. The Company is engaged in developing, constructing, operating and managing power plants throughout China. The Company's segments include PRC power segment, Singapore segment and all other segments (mainly including port and transportation operations). The Company's domestic power plants are located in 21 provinces, provincial-level municipalities and autonomous regions. Its power generation operations have coverage in the Northeast China Grid, the Northern China Grid, the Northwest China Grid, the Eastern China Grid, the Central China Grid, the Southern China Grid, and the overseas coverage in Singapore. The Company also has a wholly owned power company in Singapore, Tuas Power Group.