This caused him to neglect Murong Sheng's mother Empress Dowager Ding, with whom he had an affair and whose support was instrumental in his becoming emperor.
It was said he was so inclined to grant every wish that she and her sister Song'e had, and providing them with every luxury, that his small empire's resources were highly drained.
In other known events, she was said to have demanded to have jellied fish in the summer and fresh Rehmannia roots in the winter—neither of which were obtainable—and Murong Xi executed officials in charge of supplying the palace for their failures.
In spring 405, Murong Xi, with Fu with him, attacked Goguryeo's major city Liaodong (遼東, in modern Liaoyang, Liaoning), and had almost captured it.
However, at Fu's insistence that she wanted to observe a battle, he abandoned his heavy guard and took his faster cavalry to attack Goguryeo.
He ordered that a magnificent tomb be built for her, and also forced his sister-in-law, Princess Zhang of Gaoyang (Murong Long's wife) to commit suicide so that she could be buried with Empress Fu.