Li Siyuan
In fall 918, Li Cunxu planned to launch a major attack on Later Liang, and he gathered troops directly under his command at Wei. Zhou, Li Cunshen, and Li Siyuan all led their own troops to rendezvous with him there as well, along with troops sent by Wang Chuzhi. He crossed the Yellow River into Later Liang territory, with the intent of destroying Later Liang. Subsequently, the joint Jin forces encountered the Later Liang forces under He Gui at Huliu Slope (胡柳陂, in modern Heze, Shandong). The battle was initially a major Jin defeat, with Zhou being killed in the battle. In the confusion of the battle, Li Siyuan believed that Li Cunxu had already retreated north of the Yellow River, and therefore retreated. Li Cunxu, however, was subsequently able to turn the battle around and defeat He Gui's Later Liang forces, causing the battle to be an overall stalemate in which both sides lost over two thirds of their armies, before withdrawing back north. When Li Siyuan rendezvoused with him, Li Cunxu was displeased, believing that Li Siyuan had thought that he died and was abandoning the battle. However, as Li Congke, who got separated from Li Siyuan during the battle and ended up fighting under Li Cunxu during the second stage of the battle, had great contributions during it, Li Cunxu did not punish Li Siyuan, although he did not treat Li Siyuan with as great respect subsequently.