Hou, eventually coming to believe that Emperor Wu would betray him and turn him over to Eastern Wu to exchange for Xiao Yuanming, rebelled in fall 548, eventually capturing the Liang capital Jiankang and holding Emperor Wu and then his successor Emperor Jianwen of Liang as puppets.
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Thankful for the promotion, he commented that it must have been that Li Bian understood his talent but wanted to wait to let Li Jing promote him, as the Eastern Wei regent Gao Huan did with his general Murong Shaozong (慕容紹宗) (whom he did not promote with the purpose of having his son Gao Cheng do so, so that Murong would be grateful to Gao Cheng).
Gao Cheng's general Murong Shaozong (慕容紹宗), however, defeated both Xiao Yuanming – nephew of Liang's Emperor Wu, whom Emperor Wu sent to assist Hou – and Hou, capturing Xiao Yuanming and forcing Hou to flee to Liang.
In fall 545, due to an alliance between Western Wei and Rouran to attack Eastern Wei, Gao Huan sued for peace with Rouran by requesting a marriage between a daughter of Rouran's Chiliantoubingdoufa Khan Yujiulü Anagui and Gao Cheng.