Kumo Xi
The Kumo Xi (traditional Chinese: 庫莫奚; simplified Chinese: 库莫奚; pinyin: Kùmò Xī), also known as the Tatabi, were ancient steppe people located in modern Northeast China from 207 to 907 AD. After the death of their ancestor Tadun in 207, they were no longer called Wuhuan but joined the Khitan Xianbei in submitting to the Yuwen Xianbei. Their history is closely linked to the more famous Khitan.