However, there were many question marks on that assumption. First, the Huangtou Uighur lived along the southern edge of the Tarim Basin and were active in an area of about 500 kilometers wide from Yuechang City(today’s Qiemo area) in the west and Ruoqiang in the east, which was far from the scope of activity of the Shazhou Uighur. Second, the composition of Huangtou Uighur was very complicated, including Basmil, Turgis and Qirqiz people in addition to Uighur tribes. Therefore, it was highly likely that Huangtou Uighur were part of Gaochang Uighur, rather than that of Shazhou Uighur.
Huangtou Uighur were also called “Sarig Uygur” during the Mongol Yuan Dynasty. At that time they were under the administration of Lord of Xining, and mixed with some Mongols. At the end of the 15th century, they moved to the Ganzhou region at River West Corridor, developing into today’s Yugur people. The Yang family from the Yugurs got their surname from Yaglok, the khan family of ancient Uighur s.
After the Uighur Khanate north of the desert fell apart, 15 Uighur divisions moved to the west led by Pang Tegin. The population of the westbound 15 divisions was estimated by some people to be somewhere between over 100,000 and 300,000^. Since only after ten years of the westbound movement did the population led by Pang Tegin “gradually rose to 200ï¼000”_, our estimation is the initial population of the 15 divisions was below 200,000. The westbound Uighur first reached
Beiting along the traditional road on the steppe, and then dispersed in order to take enough pastureland. Some tribes continued to move west and reached where the Karluk division lived to the west of the Congling Mountains. These tribes mainly spread around the Issyk-kul Lake and Ili River valley. Together with the Karluk division west of the Congling Mountains, they later founded the Karakhanid Dynasty. Most westbound Uighurs stayed in today’s Xinjiang, in the Tianshan valley north of Yanqi and Casa,antiguo jardín del tibet around Beiting, who built the Gaochang Uighur regime later. In 842 AD (the 2nd year of Huichang), the Qirqiz division marched westward from the Mongolian steppe and took Beiting and Turpan. Pang Tegin then retreated to Yanqi. At that time, the southbound Uighur already produced Oge Khan, so Pang Tegin called himself Yabgou, which showed that he recognized Oge as the common ruler of the entire Uighur population. In 856 AD (the 10th year of Dazhong reign), Pang Tegin was “still in Anxi” (should be Yanqi)ç».