Upon hearing his father's death and Lan Han's coup, Murong Sheng resolved to immediately head to Longcheng to mourn his father, believing that Lan Han would have pity on him, after having killed his father, and would spare him based on his having married Lan Han's daughter. His judgment was correct, and with his wife Princess Lan's, and her mother Lady Yi's intercession, Murong Sheng was spared, despite repeated requests by Lan Han's brothers Lan Ti () and Lan Jia'nan to have Murong Sheng killed.