Xiu Prefecture

Xiuzhou or Xiu Prefecture was a zhou (prefecture) in imperial China, centering on modern Jiaxing, Zhejiang, China. Its administrative area contained most of modern Shanghai. It was created by the Wuyue kingdom in 938; in 1195, the Song dynasty renamed it Jiaxing Prefecture.

Geography
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:
 * Under the administration of Jiaxing, Zhejiang:
 * Jiaxing
 * Pinghu
 * Tongxiang
 * Haiyan County
 * Jiashan County
 * Under the administration of Shanghai:
 * Shanghai (except for Jiading District, Baoshan District and Chongming County)