 The emperor Yang Guang ordered Han Qinhu, Yuwen Chengdu, Xin Wenli (See Below) and Shang Shitu (See Below), all great warriors, to attack Nanyang Pass.Wu Yunzhao's troop defeated troops of Han Qinhu, Xin Wenli and Shang Shitu, but they could not challenge Yuwen Chengdu.Wu sent his assistant Jiao Fang to break the encirclement to ask for help from his cousin Wu Tianxi.