Liu Zhijun return to the Qi front, where Liu had been stationed. Li Cunxu himself had, immediately after becoming prince, had to deal with a conspiracy by Li Kening and an adoptive son of Li Keyong's, Li Cunhao (), to overthrow him, but after executing Li Kening and Li Cunhao, he prepared for a campaign to save Li Sizhao. He put Ding Hui in nominal command of the operation, while he himself, Zhou, and Li Siyuan led the main attacks against the Later Liang centipede encampment. They attacked it under the cover of fog, and the Later Liang forces collapsed and fled. When Zhou subsequently arrived at the city walls and announced that the siege had been lifted, Li Sizhao initially did not believe him, but when Li Cunxu subsequently arrived, wearing white armor (thus signifying that Li Keyong had died), Li Sizhao realized what had occurred and fell into deep mourning before opening the gates to let Li Cunxu enter. (Before the battle, Li Cunxu had told Zhou what Li Keyong had said before his death, and Zhou, in response, fought particularly fiercely during the battle. After the battle, he relayed what occurred to Li Sizhao, and the two reformed a friendship.) In the aftermaths of the siege, it was said that Lu had lost over half of its population due to cold and hunger, and the economy had collapsed. Li Sizhao, in response, encouraged farming and caring for silkworms, and lessened the tax burden on the people. It was said that within several years, Lu was back to prosperity. In fall 908, Li Sizhao and Zhou attacked Later Liang's Jin Prefecture and put it under siege. Later Liang's Emperor Taizu personally went to aid Jin Prefecture, and when Li Sizhao and Zhou heard that the Later Liang emperor would be soon arriving, they withdrew. In 914, after Li Cunxu had conquered the territory (then known as Yan) of Liu Rengong's son and successor Liu Shouguang, he advanced south to attack Xing Prefecture. Li Sizhao took his army and joined Li Cunxu in the attack. However, when Yang Shihou arrived to aid the Later Liang garrison of Xing, the Jin army withdrew. In 916, while Li Cunxu was in a standoff with the Later Liang general Liu Xun at Wei Prefecture (魏州, Weibo's capital, which had by that point fallen to Jin), the Later Liang general Wang Tan ()