Geography of Taiwan and has an area of (including some minor islands). The shape of the main island is similar to a sweet potato oriented in a south-to-north direction, and therefore Taiwanese, especially the Min Nan speakers, often call themselves "children of the Sweet Potato". The central point of the island is the Geographic Center of Taiwan in Puli Township, Nantou County. The southernmost point of the island is the Taiwan Southernmost Point in Hengchun Township, Pingtung County. The island of Taiwan is separated from the southeast coast of China by the Taiwan Strait, which ranges from at its widest point to at
Free area of the Republic of China China" or simply the "Taiwan Area". The term "Tai-Peng-Kin-Ma" is also essentially equivalent except that it only refers to the four main islands of the region - Taiwan, Penghu, Kinmen and Matsu, to the exclusion of the South China Sea area possessions. The term is opposed to "mainland area", which is practically viewed synonymous to mainland China. The term "free area" or "Free China" was used during the Second Sino-Japanese War (1937–45) to describe the territories under the control of the Kuomintang (KMT) government in Chongqing (at the time romanized as Chungking), as opposed to the parts of China under