China (officially the People's Republic of China), is a sovereign state located in East Asia. It is the world's most populous country, with a population of over 1.35 billion. The PRC is a single-party state governed by the Chinese Communist Party, with its seat of government in the capital city of Beijing. It exercises jurisdiction over 22 provinces, five autonomous regions, four direct-controlled municipalities (Beijing, Tianjin, Shanghai and Chongqing), and two mostly self-governing special administrative regions (Hong Kong and Macau). The PRC also claims the territories governed by the Republic of China (ROC), a separate political entity commonly known as Taiwan, as a part of its territory, which includes the island of Taiwan as Taiwan Province, Kinmen and Matsu as a part of Fujian Province and islands the ROC controls in the South China Sea as a part of Hainan Province. These claims are controversial due to the complex political status of Taiwan.