is a region in East Asia covering much of the Tibetan Plateau spanning about 2.5 million km2
. It is the traditional homeland of the Tibetan people as well as some other ethnic groups such as Monpa, Tamang, Qiang, Sherpa, and Lhoba peoples and is now also inhabited by considerable numbers of Han Chinese and Hui people. Tibet is the highest region on Earth, with an average elevation of 5,000 m (16,000 ft). The highest elevation in Tibet is Mount Everest, Earth's highest mountain, rising 8,848 m (29,029 ft) above sea level.