 In 545, pursuant to Gao Huan's request, Emperor Xiaojing took the cousin of the khan of Tuyuhun, Murong Kualü (慕容夸呂), as a concubine, to try to enhance the relationship with Tuyuhun.In 547, Gao Huan died, and Gao Cheng took over full power of the government.In light of Gao Huan's death, the general Hou Jing, who did not respect Gao Cheng, first surrendered the 13 provinces he controlled (the region between the Huai River and Yellow River) to Western Wei, and then to Liang.