Uyghurs
The history of the Uyghur people, as with the ethnic origin of the people, is a matter of contention between Uyghur nationalists and the Chinese authority. Uyghur historians viewed the Uyghurs as the original inhabitants of Xinjiang with a long history. Uyghur politician and historian Muhemmed Imin Bughra wrote in his book "A History of East Turkestan", stressing the Turkic aspects of his people, that the Turks have a 9000-year history, while historian Turghun Almas incorporated discoveries of Tarim mummies to conclude that Uyghurs have over 6400 years of history, and the World Uyghur Congress claimed a 4,000-year history in East Turkestan. However, the official Chinese view asserts that the Uyghurs in Xinjiang originated from the Tiele tribes and only became the main social and political force in Xinjiang during the ninth century when they migrated to Xinjiang from Mongolia after the collapse of the Uyghur Khaganate, replacing the Han Chinese they claimed were there since the Han Dynasty. Many contemporary Western scholars, however, do not consider the modern Uyghurs to be of direct linear descent from the old Uyghur Khaganate of Mongolia. Rather, they consider them to be descendants of a number of peoples, one of them the ancient Uyghurs.
History of Tuva
The indigenous inhabitants of the present-day Tuva Republic are a Turkic-speaking people of South Siberia, whose language shows strong Samoyedic and Mongolian influences. The name "Tuva" probably derives from a Samoyedic tribe, referred to in 7th-century Chinese sources as Dubo or Tupo, who lived in the upper Yenisei region. These people were known to the Chinese and Mongolians as Uriankhai. Most scholars trace the name to the Uriankhai of the Greater Hinggan Range, a Jurched people who as a result of extensive migrations gave their name to several peoples living in the region from east Siberia and northeast China to the Altai mountains. These should not be confused with the Altai Uriankhai (ethnic Mongolians living in western Mongolia), the Altainor Uriankhai (a Turkic-speaking people in the Altai Republic within the Russian Federation), and the Khovsgolnor Uriankhai (reindeer herders in the eastern Tuva Republic).
Tuvans were subjects of the Uyghur Khanate during the 8th and early 9th centuries AD. The Uyghurs established several fortifications within Tuva as a means of subduing the population. The Uyghur Khanate was overthrown in 840 AD by a rebellion of the Yeniseian Kyrgyz who came from the upper reaches of the Yenisei. During this period, some Uyghurs were absorbed into Tuvan society. The Khirghiz ruled Tuva until the 13th century.