王都
Later in the year, Li Siyuan launched a general campaign against the rebellious warlord Wang Du the military governor of Yiwu Circuit (義武, headquartered in modern Baoding, Hebei), under the overall command of the general Wang Yanqiu. Wang Yanqiu believed Yiwu's capital Ding Prefecture () to have strong defenses and therefore would be difficult to attack directly; rather, he wanted to surround the city and put it under siege, to drain out the city's food supplies. Both Zhu and Zhang Qianzhao (), serving under Wang Yanqiu, claimed that Wang Yanqiu was being cowardly, and Li Siyuan, believing them, ordered Wang Yanqiu to attack. Wang Yanqiu's initial attacks, under such orders, resulted in heavy casualties, and he was then able to persuade Li Siyuan to allow him to resume his strategy of starving out the Ding Prefecture defense. He was eventually able to capture Ding in 929, and Wang Du committed suicide.