The Yuan Dynasty was a people on horseback. During the Yuan Dynasty, the rulers expanded and the territory expanded, which made the territory of the Yuan Dynasty expand unprecedentedly. Today, Xinjiang, Tibet, Yunnan, Northeast China, Taiwan Province Province and the South China Sea Islands are all under the jurisdiction of the Yuan Dynasty. 124/kloc-0 approached the hinterland of eastern Europe once a year, and 1246 recruited Tubo. Dali was destroyed in 1253. It can be said that the territory was unprecedented in the Yuan Dynasty.