Tibet is a plateau region in Asia, north-east of the Himalayas, in the People’s Republic of China. It is the traditional homeland of the Tibetan people as well as some other ethnic groups such as Monpas, Qiang, and Lhobas, and is now also inhabited by considerable numbers of Han and Hui people. Tibet is the highest region on earth, with an average elevation of 4,900 metres . Tibet emerged in the 7th century as a unified empire, but it soon divided into a variety of territories.