符存審
In 921, Wang Rong was killed in a coup instigated by his adoptive son Wang Deming, who subsequently took over the circuit, changed his name back to the birth name of Zhang Wenli, and slaughtered Wang Rong's family. Li Cunxu sent an army to try to destroy Zhang, commanded by Yan Bao and Shi Jiantang (史建瑭), but was contemplating leading an army himself as well after Shi was killed in battle. Dai, who was then the overall Later Liang commander of the army against Jin, tried to take advantage of the situation, but his attack on the Yellow River ford city of Desheng (德勝, in modern Puyang, Henan) was repelled by Li Cunxu himself, aided by Li Siyuan and Li Cunshen. Li Cunxu subsequently gave Li Siyuan the title of deputy commander of the Han and non-Han cavalry and infantry forces, and gave him the honorary chancellor title of "Tong Zhongshu Menxia Pingzhangshi" (同中書門下平章事). He then left Li Siyuan and Li Cunshen in defense of Desheng, while heading to join the Zhao campaign himself. When Dai subsequently tried to attack Wei Prefecture, Li Siyuan took his army to intercept Dai while warning Wei Prefecture. Dai thereafter changed directions and put Desheng under siege, but withdrew when Li Cunxu, hearing news of Dai's incursion, returned.