DiplomacyCeded Yanyun Sixteen Prefectures
He sent Sang Weihan to draw up a petition to declare himself a minister and son to the Khitan, and promised to cede sixteen states including You and Yun after the event was completed, and to lose 300,000 pieces of silk every year. Yelü Deguang agreed to send troops and in November he was appointed emperor of the Jin Dynasty in Taiyuan.
Lasting legacyThe Sixteen Prefectures of Yanyun were approximately equivalent to today's Beijing, the north of Tianjin, and the north of Hebei and Shanxi. Beijing has since become Khitan and Nanjing, and the Central Plains Dynasty failed to recover them all for more than four hundred years.