Tangut people
Suizhou or Sui Prefecture (綏州) was a "zhou" (prefecture) in imperial China centering on modern Suide County, Shaanxi, China. It existed (intermittently) from 552 to 1069. In the 10th- and 11th-centuries it was mostly controlled by the Tangut people as part of Western Xia (1038–1227) or its precursor, the Dingnan Jiedushi, although it became Song dynasty territory again in 1067.