 The same year that Abaoji became Great Khan , the Chinese warlord Zhu Wen , who in 904 had murdered the last legitimate emperor of the Tang dynasty , declared the Tang over and named himself emperor of China . His dynasty dissolved quickly , ushering in the fifty @-@ three @-@ year period of disunity known as the Five Dynasties period . One of the five dynasties , the Later Jin ( 936 – 947 ) , was a client state of the Khitans . 
