Uyghurs
Contemporary scholars consider modern Uyghurs to be the descendants of a number of people, including the ancient Uyghurs of Mongolia who arrived at the Tarim Basin after the fall of the Uyghur Khaganate, Iranic Saka tribes, and other Indo-European peoples who inhabited the Tarim Basin before the arrival of the Turkic Uyghurs. DNA analyses indicate that the peoples of central Asia such as the Uyghurs are all mixed Caucasian and East Asian. Uyghur activists identify with the Tarim mummies, remains of an ancient people who inhabited the region, but research into the genetics of ancient Tarim mummies and their links with modern Uyghurs remains problematic, both to Chinese government officials concerned with ethnic separatism, and to Uyghur activists concerned that the research could affect their people's claim of being indigenous to the region.
Semu
While administratively classified as Semu, many of these groups rather referred to themselves by their self-aware ethnic identities in everyday life, such as Uyghur. Muslims, Persians, Karakhanids and Khwarazmians in particular, were actually mistaken to be Uyghurs or at least, "from the land of the Uyghurs". Therefore, they adopted the label conferred to them by the Chinese: "Huihui", which was a corruption of the name Uyghur, but at the same time distinguishable from the name reserved for Buddhist Turpan Uyghurs proper, "Weiwuer". Of the many ethnic groups classified as "Semu" during the Yuan, only the Muslim Hui managed to survive into the Ming period as a large collective identity with self-awareness of common identity spanning across the whole China.