室韦-达怛史是中国北方民族史研究中的重要课题。就目前来看，又是相对薄弱的环节。室韦是北朝至辽金时期见诸汉文献记载的北方族。达怛一名最早见于突厥文碑铭，是突厥语族部落对室韦人的又一泛称，唐后期为中原人沿用。室韦一达怛同北魏、东魏、北齐、隋、唐、后唐、后周、北 Room Wei - History of Dachang is an important issue in the study of the history of the Chinese nation in the north. For now, it is a relatively weak link. Wei is the North from the Northern Dynasties to the Liao and Jin dynasties documented in the Han literature. Tathagata was first seen in Turkic inscriptions, is a Turkic tribe Swire people another general term, the late Tang Dynasty Central Plains people. Room Wei Yida 北 with the Northern Wei, Eastern Wei, Northern Qi, Sui, Tang, Tang, after Zhou, North