Uyghurs
Rian Thum explored the concepts of identity among the ancestors of the modern Uyghurs in Altishahr (the native Uyghur name for eastern Turkestan or southern Xinjiang) before the adoption of the name "Uyghur" in the 1930s, referring to them by the name "Altishahri" in his article "Modular History: Identity Maintenance before Uyghur Nationalism". Thum indicated that Altishahri Turkis did have a sense that they were a distinctive group separate from the Turkic Andijanis to their west, the nomadic Turkic Kirghiz, the nomadic Mongol Qalmaq, and the Han Chinese Khitay before they became known as Uyghurs. There was no single name used by them to refer to themselves, the various native names Altishahris used to refer to themselves were Altishahrlik (Altishahr person), yerlik (local), Turki, and Musulmān (Muslim), the term Musulmān in this situation did not signify religious connotations, because the Altishahris would exclude other Muslim peoples like the Kirghiz when referring to themselves as Musulmān. Dr. Laura J Newby has also noted that the sedentary Altishahri Turkic people felt themselves as a separate group from other Turkic Muslims since at least the 19th century.
Turpan
In 803, the Uyghurs of the Uyghur Khaganate seized Turfan from the Tibetans. The Uyghur Khaganate however was destroyed by the Kirghiz and its capital Ordu-Baliq in Mongolia sacked in 840. The defeat resulted in the mass movement of the Uyghurs out of Mongolia and their dispersal into Gansu and Central Asia, and many joined other Uyghurs already present in Turfan. In the early twentieth century, a collection of some 900 Christian manuscripts dating to the ninth to the twelfth centuries was found at a monastery site at Turfan.