^The term "Medieval China" is mainly used by historians of Universal History. The dates between 585 (Sui) to 1368 (Yuan) comprise the medieval period in Chinese history. Historians of Chinese history call this period the "Chinese Imperial Era", which began after the unification of the seven kingdoms by the Qin Dynasty (221–206 BC). With the Ming Dynasty, the early modern era began.
^Atwood, Christopher P. (2004), Encyclopedia of Mongolia and the Mongol Empire, New York: Facts on File, Inc., p. 583, ISBN978-0-8160-4671-3.