Murong Xi
Little is known about Murong Yun's life in the next few years. By 406, he was a major general under the reign of Murong Bao's cruel and arbitrary younger brother Murong Xi (Emperor Zhaowen), when, at the instigation of Murong Xi's wife Empress Fu Xunying, Murong Xi made a disastrous attack on Goguyreo in which many soldiers died not from battle but from exposure to the cold. Murong Yun himself suffered an arrow wound during the battle, and, because he feared Murong Xi's cruelty, used this as an excuse to resign his post and remain at home.