Li Chongjun
In 707, Emperor Zhongzong's son by a concubine, Li Chongjun the Crown Prince, who could not bear any longer repeated humiliation by his sister, Empress Wei's daughter Li Guo'er the Princess Anle and her husband Wu Chongxun (武崇訓), rose in rebellion and killed Wu Chongxun and his father Wu Sansi the Prince of Dejing (who was also Empress Wei's lover), and then marched on to the palace. At that time, a number of chancellors, including Su, led forces to defend the palace. Li Chongjun was soon defeated and killed in flight.