Tibet ( ; Tibetan: བོད, Lhasa dialect: [pʰøːʔ˨˧˩] Böd; Chinese: 藏区; pinyin: Zàngqū), or Greater Tibet, is a region in the western part of East Asia, covering much of the Tibetan Plateau and spanning about 2,500,000 km2 (970,000 sq mi). It is the homeland of the Tibetan people. Also resident on the plateau are other ethnic groups such as Mongols, Monpa, Tamang, Qiang, Sherpa, Lhoba, and since the 20th century Han Chinese and Hui. After the annexation of Tibet by the People's Republic of China in 1951, the entire plateau has been under the administration of the People's Republic of China.
https://en.wikipedia.org/wiki/Tibet