In the war between the Great Liang and Northern Yan, Regent Lin Yu led his army to a crushing victory over Northern Yan. On the way back, Lin Yu received a message by carrier pigeon that the emperor was gravely ill, so he hurried toward the capital with his personal guards.
They were ambushed on the way at Mount Jueming. He later learned that the person who had tried to assassinate him was the Empress Dowager herself, his former wife, Zhao Xian'er.