 As, at that time, the Shatuo prince of Jin, Li Cunxu, was locked in a war against archrival Later Liang, he sought an alliance with the Khitan, and he honoured Emperor Taizu as an uncle and Empress Shulü as an aunt.In 921, the general Lu Wenjin, who had defected from Jin to Khitan, urged Emperor Taizu to attack Jin.About the same time, two coups occurred within the domains of Jin allies Zhao and Yiwu Circuit (義武, headquartered in modern Baoding, Hebei) — as Zhao's prince Wang Rong was assassinated and his adoptive son Zhang Wenli seized control of the domain, and Yiwu's military governor Wang Chuzhi was overthrown by his adoptive son Wang Du.