Yelü Bei
In 916, Abaoji assumed the title of Celestial Emperor, proclaimed a Chinese era name, and built a Confucian temple. He named his eldest son, Yelü Bei, from his primary consort, Shulü Ping, as heir apparent and demanded the entire nobility to swear fealty to him. Two years later, the Khitan court was moved to the "Supreme Capital" (Shangjing), a newly built walled city with a grand park and imperial tents where the Chinese palaces would normally be located. Abaoji fostered the construction of 30 more walled cities for his captured Chinese subjects to inhabit. The Supreme Capital was joined by the "Eastern Capital" (Dongjing). Administration of the empire was divided between a Northern Administration overseeing steppe and tribal affairs and a Southern Establishment overseeing the settled and Chinese population. The two institutions were headed by chancellors, the northern one appointed by the Xiao consort clan, and the southern one appointed by the ruling Yelü clan.