Around the new year 823, when Emperor Muzong was participating in a polo game in the palace, a eunuch fell off his horse. Emperor Muzong, shocked by the incident, suffered a stroke and was unable to walk. For days, no official was able to meet with Emperor Muzong. At the repeated requests of Pei and Li Fengji, Emperor Muzong was taken to an imperial hall to meet with the officials to calm the people's hearts, and at their further urging, he created his oldest son Li Zhan the Prince of Jing, crown prince. It was said that shortly thereafter, Emperor Muzong recovered somewhat from his stroke.