Under Genghis Khan, the Mongol Empire grew to encompass Central Asia, parts of the Middle East, and east to the borders of the Korean Peninsula.
For more information-http://history-world.org/mongol_empire.htm
Chu Yuan-chang gradually conquered China, and threw out the Mongols. In 1368 AD Chu Yuan-chang declared himself emperor of China.
For more information-http://www.britannica.com/EBchecked/topic/654422/Yuan-dynasty