It is an island in East Asia. "Taiwan" is also commonly used to refer to the territories administered by the Republic of China (ROC), a state whose effective area of administration consists of the island of Taiwan, Lanyu (Orchid Island) and Green Island in the Pacific off the Taiwan coast, the Pescadores in the Taiwan Strait, and Kinmen and Matsu off the southeast coast of the territories administered by the People's Republic of China (PRC). Taiwan is administered as Taiwan Province, Republic of China. It is one of two provinces administered by the Republic of China.
The main island of Taiwan, sometimes also referred to as Formosa (from Portuguese, meaning "beautiful"). The island is 394 kilometers (245 miles) long and 144 kilometers (89 miles) wide and consists of steep mountains covered by tropical and subtropical vegetation.