宿州市
Later in 891, under Zhu's orders, Ding attacked Su Prefecture (宿州, in modern Suzhou, Anhui), leading to Su's prefect Zhang Yun () surrendering to him. Later in the year, Ding and Zhang Guiba () engaged Zhu Jin the military governor of Taining Circuit (泰寧, headquartered in modern Jining, Shandong), who had been locked in years of warfare with Zhu Quanzhong; they defeated him and inflicted great casualties on his troops; he himself barely escaped. While most of Ding's subsequent battles were not spelled out in history, it was said that he had great contributions in Zhu Quanzhong's victorious campaigns against the rebel emperor Qin Zongquan whose capital was at Cai Prefecture (蔡州, in modern Zhumadian, Henan), Shi Pu the military governor of Ganhua Circuit (感化, headquartered in modern Xuzhou, Jiangsu), and Zhu Jin and his cousin Zhu Xuan the military governor of Tianping Circuit (天平, headquartered in modern Tai'an, Shandong), helping Zhu Quanzhong to greatly expand his territory.