Historically, Khitan lived in today's Mongolia and northeast China, and lived a life of semi-farming and semi-herding. His language belongs to Mongolian family of Altai language family.
Others, such as Tubo, the ancestor of Tibetans now, have always occupied the Qinghai-Tibet Plateau. Uighurs, originally in Mongolian grassland, were expelled to Xinjiang by Turks, and they are the ancestors of Uighurs in China.
Extended data:
1. The Huns in China ancient books were a powerful nomadic people who ruled the northern part of the Central Plains in the late Qin Dynasty and the early Han Dynasty. When it was strong, it broke the East Lake in the east, connected with Loulan and Wang Di in Henan in the south, attacked Yueshi and other countries in the western regions in the west, served Dingling in the north and Jiankun in the northwest. The mountain range is centered on the Mongolian Plateau and extends eastward to the eastern part of Inner Mongolia.
The Great Wall of the South is adjacent to the Qin and Han Dynasties and once controlled the Hetao and Ordos regions. Crossing Altai Mountain to the west, reaching Qingji and Fergana Valley, and reaching the periphery of Lake Baikal to the north. Known as the "country of hundred barbarians".
2. The Khitan nationality is an ancient nomadic people in China, which originated in the northeast of China and lived a semi-agricultural and semi-pastoral life. Qidan was divided into eight parts in the early stage, and a unified Yamato alliance was formed in the early Tang Dynasty. For the origin of the Khitan nationality, it is said that there are two rivers flowing in the northern prairie:
One ran down from the southern end of Daxinganling. The Khitans called it the Xilamulun River, also known as "Yellow Water", and the literature wrote "Yellow River". Another river comes from the western end of Yiwulu Mountain. It is called Laoha River, also called Tuhe River. The Khitan nationality rose in the Xilamulun River and Laoha River basins. The ethnic migration and integration in this area presents a very frequent and complicated state.
References:
Baidu Encyclopedia _ Xiongnu
Baidu Encyclopedia _ Qidan