He defeated the Song dynasty to unite China and establish the Yuan dynasty.
This man's younger brother, Arigboge, tried to replace him when their older brother, Mongke, died. His reforms included making paper money the only form of exchange in his empire and dividing the people into four social classes. This man moved his capital from Karakorum to Ta-tu, which is now Beijing. Many of his ships were destroyed by a typhoon on a failed naval expedition to Japan. He defeated the Song dynasty to unite China and establish the Yuan dynasty. For 10 points, name this man who was visited by Marco Polo, the grandson of Genghis.
This man's younger brother, Arigboge, tried to replace him when their older brother, Mongke, died.
Kublai Khan [or Xubilai Xaan; or King Kubilai; or Qubilai Qayan; or Shizu Yuan]