宋元时期 ,西域的民族格局上承隋唐时期的余绪 ,下历契丹、蒙古人西迁浪潮的激荡 ,经历了一次分解又重新组合的过程。其间 ,旧的一些民族 (部族 )在历史舞台上消失了 ,新的一些民族形成了 ,从而奠定了近现代新疆民族格局的基础。这一时期 ,西域政治上虽大多处于相对独立发展的 During the Song and Yuan dynasties, the national pattern of the Western Regions inherited Yu Xu of the Sui and Tang dynasties, the subsequent turmoil of the Qidan and the Mongols moving westwards, and underwent a process of decomposition and recombination. In the meantime, some old peoples (clans) disappeared on the stage of history and some new ethnic groups were formed, laying the foundation for the modern ethnic pattern in Xinjiang. During this period, most of the western regions were relatively independent in political development