The administrative region of Xiu Prefecture in the Song dynasty was in modern and northern Zhejiang and southern and central Shanghai. It probably includes parts of modern:
Shi Weile, ed. (2005). Zhongguo Lishi Diming Da Cidian (中国历史地名大词典) [Large Dictionary of Chinese Historical Place Names] (in Chinese). China Social Sciences Press. p. 1278. ISBN7-5004-4929-1.