Yelü Bei
Yelü Bei subsequently served as Emperor Taizu's forward commander in campaigns against the Wugu () and the Tangut tribes. Later, on incursions that Emperor Taizu made into the Chinese/Shatuo state Former Jin territory – specifically, Jin's Lulong Circuit (盧龍, headquartered in modern Beijing) – he left Yelü Bei in charge at his capital Linhuang Municipality (臨潢, in modern Chifeng, Inner Mongolia). It was during this time that Yelü Bei was said to have drafted a plan to conquer Khitan's eastern neighbor Balhae.