After the Yuan Dynasty unified the country, its territory was: Mongolia and Siberia in the north, across Lake Baikal, to the South China Sea in the south, including present-day Tibet and Yunnan in the southwest, eastern Xinjiang in the northwest, and the Outer Xing'an Mountains and Okhotsk in the northeast Kehai, with a total area of ??more than 15 million square kilometers. The country was divided into the hinterland area near the capital (i.e. parts of present-day Hebei, Shandong, Shanxi and Inner Mongolia) under the direct jurisdiction of Zhongshu Province, and the Tubo area (today's Tibet) under the jurisdiction of the Xuanzheng Yuan (originally named Zongzhiyuan). and 10 Xing Zhongshu provinces (respectively Shaanxi, Liaoyang, Gansu, Henan Jiangbei, Sichuan, Yunnan, Huguang, Jiangsu and Zhejiang, Jiangxi, and Lingbei Xing Zhongshu provinces).
In addition, the Yuan Dynasty established the Zhengdong Province (also known as the Zhengdong Province) on the Korean Peninsula with a very special status: