Page "History of China" Paragraph 75

Kublai Khan, grandson of Genghis Khan, wanting to adopt the customs of China, established the Yuan Dynasty.

This was the first dynasty to rule the whole of China from Beijing as the capital.

Beijing had been ceded to Liao in AD 938 with the Sixteen Prefectures of Yan Yun.

Before that, it had been the capital of the Jin, who did not rule all of China.