Southwest China (Chinese: 西南; pinyin: Xīnán; lit. 'Westsouth') is a region in the south of the People's Republic of China, traditionally known as Southwest China due to its location in relation to historical China proper. The narrowest concept of Southwest China consists of Sichuan, Yunnan, and Guizhou, while wider definitions often include and Chongqing, Guangxi, and western portions of Hunan. The official government definition of Southwest China includes the core provinces of Sichuan, Chongqing, Yunnan, and Guizhou, in addition to the Tibet Autonomous Region which has not traditionally been included as part of the region.