Zhu Xuan
However, just later that year, the Zhu Xuan/Zhu Jin alliance with Zhu Quanzhong would break up. Zhu Quanzhong had long had designs on capturing both Tianping and Taining, but found no excuse to attack Zhu Xuan and Zhu Jin, given that they had aided him. He thus made up accusations that they had induced Xuanwu soldiers to desert and sent a harshly worded accusation to Zhu Xuan. Zhu Xuan responded with a harsh letter. Zhu Quanzhong used this as an excuse to send Zhu Zhen and Ge Congzhou to attack Tianping's Cao Prefecture (曹州, in modern Heze, Shandong); they captured it and executed Cao's prefect Qiu Hongli (). He then attacked Pu Prefecture (濮州, in modern Heze). Zhu Xuan and Zhu Jin engaged him but were defeated, barely escaping with their lives. This thus started a war that would not end until Zhu Xuan's death. Later that year, when Zhu Xuan sent his brother Zhu Han () to try to lift the siege on Pu, Zhu Zhen defeated and killed Zhu Han. Zhu Zhen subsequently captured Pu, forcing Zhu Yu (who was then the prefect of Pu) to flee to Yun Prefecture. Zhu Zhen then attacked Yun. Zhu Xuan had Zhu Yu send a letter to Zhu Zhen, falsely claiming to be ready to surrender Yun to him. When Zhu Zhen sent soldiers to enter the city on Zhu Yu's signal, the Xuanwu soldiers fell into a trap set by Zhu Xuan and were massacred. Having suffered this loss, Zhu Zhen retreated. Zhu Xuan subsequently recaptured Cao as well.