However, Dou Jiande the Prince of Xia, another rebel leader intent on attacking Yuwen Huaji, soon arrived, forcing Li Shentong to withdraw. Dou put Liaocheng under siege as well, and Wang Bo opened the city gates to welcome Xia forces in. Dou captured Yuwen Huaji and, referring to himself as "your subject" when greeting Empress Xiao, declared a mourning period for Emperor Yang and comforted the Sui officials. He arrested Yuwen Zhiji, Yang Shilan, and several other associates of Yuwen Huaji, executing them publicly. He then delivered Yuwen Huaji and Yuwen Huaji's sons Yuwen Chengji (宇文承基) and Yuwen Chengzhi (宇文承阯) to his base Xiangguo (襄國, in modern Xingtai, Hebei) and had them beheaded in public. Before Yuwen Huaji was executed, the only thing he stated was, "I have never done any harm to the Prince of Xia!"