Xu Hai, wounded and bogged down in the siege, was shocked to hear that Wang Zhi was negotiating his own surrender with Hu Zongxian, and that Mao Haifeng was already helping Hu put down pirates in the Hangzhou Bay. Xu Hai told Hu's agents that while he could be induced to surrender, he could not speak for his ally Chen Dong, upon which the agents bluffed that Chen Dong had already reached an agreement with the government. This made Xu Hai tremendously suspicious of Chen Dong, who grew restless learning that Xu Hai was seeing government agents. Xu Hai eventually agreed to surrender on the condition that Hu Zongxian would secure his pardon and mollify his Japanese followers with gifts. Approximately a month into the siege, Xu Hai released 200 Ming prisoners as a sign of goodwill and withdrew from Tongxiang. Chen Dong found himself abandoned by his ally and angrily attacked Tongxiang for one more day before retreating in another direction. Breakdown of the marauder alliance The retreating raiders made their way to the coast at Zhapu while carrying their plunder with them. Their heavily laden river boats, thousands in number, stretched for miles. They however, did not have the seaworthy vessels to make their escape from China since Xu Hai had theirs destroyed when they first landed. Here Hu Zongxian offered them a deal: all who wished to surrender would be given positions in the military, while all who wished to return to Japan would be provided with seagoing vessels. The raiders had little choice but to accept. Now that Hu Zongxian had Xu Hai by the ear, he incited Xu Hai to attack his fellow marauders north in Songjiang to prove his sincerity. Xu Hai did so, hoping to keep the Songjiang marauders' booty and vessels for himself. As the raider groups fought each other in Zhujing (朱涇), the general Yu Dayou burned the river boats that Xu Hai left behind, and made short work of the remnant Songjiang marauders fleeing from Xu Hai. The operation left Xu Hai stranded and terrified, and he sent gifts and a younger brother as hostage to Hu as reassurance of his surrender. To break up Xu Hai's power further, Hu Zongxian made use of pre-existing tension among Xu Hai, Chen Dong, and Ye Ma. Xu Hai and Ye Ming had previously quarrelled over a woman they took captive and over