Tibet ( ) is a region in the western part of East Asia, covering much of the Tibetan Plateau. It is the homeland of the Tibetans. Other ethnic groups also reside on the plateau, including Mongols, the Lhoba, Monpa, Qiang, Sherpa, and since the 20th century, Han and Hui peoples. Tibet is the highest region on Earth, with an average elevation of 4,380 m (14,000 ft). Lying within the Himalayas, the highest point in Tibet is Mount Everest – the highest peak on Earth, standing 8,848 m (29,000 ft) above sea level.
In the 7th century, the Yarlung dynasty expanded into surrounding areas such as Amdo.