The Four Class System
Location of Capital: Kai Feng in today's Henan Province
Replaced by: Ming Dynasty
The territory of the Yuan Dynasty was divided into the Central Region (腹裏) and places under control of various Xing Zhongshusheng (行中書省 or 行省) or the Xuanzheng Institute (宣政院). The Central Region, consisting of present-day Hebei, Shandong, Shanxi, the south-eastern part of present-day Inner Mongolia and the Henan areas to the north of the Yellow River, was considered the most important region of the dynasty and directly governed by Zhongshusheng (中書省, "Secretariat") at Dadu; similarly, another top-level administrative department called the Xuanzheng Institute governed the whole of modern-day Tibet and a south-east part of Turkestan. Xing Zhongshusheng (行中書省,
"branch Secretariat" or "en-route Secretariat"), or simply Xingsheng (行省), were provincial-level administrative organizations or institutions, sometimes roughly translated as "Province", though they were not exactly provinces in modern sense. There were 11 Xing Zhongshusheng or Xingsheng in Yuan Dynasty. 1. Gansu Xingsheng (甘肅行省) with Zhangye District as its seat of government. Under this came most of present-day Ningxia Hui Autonomous Region (originally the Tangut territory), south-eastern Gansu Province, and part of north-eastern Amdo. 2. Henan Jiangbei Xingsheng (河南江北行省) with Kaifeng District as its seat of government. Under this came the Henan areas to the south of the Yellow River, north-east Hubei, Jiangsu, the north-eastern part of Jiangxi Province.