Gu Zhengwen speculated that Wu Shi might take the initiative to take responsibility because of his feelings for his subordinates, and planned to use Nie Xi's self-sacrifice to break through Wu Shi's psychological defense.Gu Zhengwen showed Wu Shi Nie Xi's suicide note. Nie Xi said in his suicide note that he was the leader of the Donghai Group and had been using Wu Shi to obtain intelligence.

Chen Baocang received a message from his superiors on the radio and knew that the information had been sent. In order to protect Wu Shi, he resolutely surrendered and claimed that he was the leader of the Donghai Group.Wu Shi was deeply moved by Nie Xi and Chen Baocang's spirit of self-sacrifice. In order to save the lives of Chen Baocang and Nie Xi, Wu Shi finally admitted his identity and drew a detailed defense map of the southeastern islands.
Wu Shi firmly believed that even if the Kuomintang adjusted its deployment, it would not be able to change the situation of insufficient military strength.This move shocked Chiang Kai-shek in the observation room.Wu Shi not only confessed his general facts, but also expressed his deep feelings for comrades such as Nie Xi and Chen Baocang.He and Chen Baocang met in the interrogation room. The two supported each other and showed their determination to fear life and death.