Kublai was the grandson of Genghis Khan. His youth spent studying Chinese culture. When Mongke became emperor, Kublai became governor of South region Mongols. Kublai Khan then declared himself not only as Khan of the Mongol Empire, but also as the Emperor of China, and establish the Yuan Dynasty in China land. He was then ordered to move to the Mongol capital of Beijing. At the time of the Mongol empire reached its golden age in which traders from China can go to trade in Europe safely. Troops Kubulai Khan has also been registered to the invasion to the island of Java.