李愬
Just before dawn on November 28, Li Su's forces reached the walls of Cai Prefecture. Li You and Li Zhongyi led their soldiers in climbing up the walls, catching the wall defenders in their sleep and killing them. Li You and Li Zhongyi then entered the city and opened the gates to allow the rest of Li Su's forces in. Li Su took over Wu's headquarters and had the inner city, his mansion, where he was, surrounded. Believing that Wu's only hope was if the key Zhangyi commander Dong Chongzhi (), who was in command of the forces at Huiqu, quickly advanced back to save him, he visited Dong's household and comforted Dong's family, sending Dong's son Dong Chuandao () to Huiqu to summon him back. Dong Chongzhi immediately abandoned his troops and returned to Cai Prefecture to surrender to Li Su. Li Su had Li Jincheng attack the inner city, and by this point, the residents of Cai Prefecture were assisting Li Su's attack. On November 29, Wu surrendered, and Li Su arrested him and delivered him to Chang'an.