Sun Moon Lake is situated in Nantou County, Taiwan. The lake's name is derived from its shape, with the eastern side said to resemble the sun and the western side the moon. Although a natural hydrologic feature, the lake was expanded in size during the period of Japanese occupation when water from a nearby river was channeled into it for the purpose of hydropower generation. The area surrounding the lake has historically been occupied by the Thao people, one of Taiwan's aboriginal tribes. Sun Moon Lake was a favorite recreation spot of former Republic of China leader CHIANG Kai-shek and it is a popular tourist destination today.