In gratitude, Wang Rong took 37 corps out of his army and put them under Wang Deming's command, sending him to accompany and assist Li Cunxu in his campaigns. In 912, when Li Cunxu was set to launch a major attack against Liu Rengong's son and successor Liu Shouguang, who had claimed the title of Emperor of Yan, Wang Deming joined forces with Li Cunxu's major general Zhou Dewei, as well as Cheng Yan (程巖), who commanded an army from Jin's and Zhao's ally Yiwu Circuit (義武, headquartered in modern Baoding, Hebei), and they subsequently sieged You Prefecture. By the end of the year, however, Wang appeared to be no longer participating in the campaign, for he was recorded as taking 30,000 men to raid Later Liang's northern territory and capturing Zongcheng (宗城, in modern Xingtai, Hebei). However, the Later Liang general Yang Shihou counterattacked and defeated him, killing some 5,000 of his men. In 913, while Zhou still had Liu Shouguang under siege at You, the new Later Liang emperor Zhu Zhen (Emperor Taizu's son) sent Yang and Liu Shouguang's brother Liu Shouqi (劉守奇, who had submitted to Later Liang) north to attack Zhao, apparently to divert Zhao's and Jin's attention from Liu Shouguang. When Wang Rong sought aid from Zhou, Zhou sent his officer Li Shaoheng (李紹衡) to join Wang Deming in resisting the Later Liang army. Subsequently, the Later Liang army left Chengde and headed for Yichang. By 920, Wang Rong had recalled Wang Deming back to Chengde to command his guard corps, while sending another officer, Fu Xi (符習), to replace him as the commander of the Zhao forces accompanying Li Cunxu. That year, Wang Rong, who had become accustomed to luxurious living, alienated his army by spending too much time at his vacation home in the mountains west of Zhao's capital Zhen Prefecture (鎮州). The soldiers mutinied and killed Wang Rong's favorite eunuch Shi Ximeng (石希蒙), and in response, Wang Rong killed the eunuch Li Honggui (李弘規) and the officer Li Ai (李藹), whom he blamed for inciting the mutiny, and slaughtered Li Honggui's and Li Ai's families.