Mainland China, also known as the Chinese mainland, is the geopolitical as well as geographical area under the direct jurisdiction of the People's Republic of China (PRC). It includes Hainan island and strictly speaking, politically, does not include the special administrative regions of Hong Kong and Macau, even though both are partially on the geographic mainland (continental landmass). Mainland China, also known as the Chinese mainland, is the geopolitical as well as geographical area under the direct jurisdiction of the People's Republic of China (PRC). It includes Hainan island and strictly speaking, politically, does not include the special administrative regions of Hong Kong and Macau, even though both are partially on the geographic mainland (continental landmass).