Zheng Chaoshan sent Duan Feipeng to take Mrs. Wei away, and asked Mrs. Wei what she wanted from Manager Liao. Mrs. Wei admits that she and Qin Zhaodi are both in the middle, and both know that Zheng Chaoshan is a spy. Seeing that Zheng Chaoshan was about to kill herself, Mrs. Wei said that if she had an appointment with Qin Zhaodi today, if Qin Zhaodi could not see herself, she would sue Zheng Chaoshan as a police officer. After Zheng Chaoshan killed Mrs. Wei, he hurried home and awakened Qin Zhaodi when he opened the door. When Qin Zhaodi waited for his return as usual, Zheng Zhaoshan’s knife slowly closed up.
Qin Zhaodi quietly came to the temple where Mrs. Wei was located the next day, seeing that Mrs. Wei was not gradually aware that she was dead. Qin Zhaodi secretly followed Zheng Chaoshan, and finally followed him to a church. Hao Pingchuan borrowed Bai Ling’s toolbox and carried a box to investigate the case of Wang Zhongxu Xiaoshan’s killing. However, he ended up trying hard, but only half a fingerprint was found. Zheng Chaoyang felt that the killer was a habitual criminal and wiped his fingerprints after committing the crime.
Zheng Chaoshan thought about Qin Zhaodi, and then called her to her office. Zheng Chaoshan poured a glass of water to Qin Zhaodi, but Qin Zhaodi saw that Zheng Chaoshan wiped his hands with alcohol after putting down a small bottle, so he felt that Zheng Chaoshan’s water might have been poisoned. Zheng Chaoshan urged Qin Zhaodi to drink water, but Qin Zhaodi hesitated to remember what Mrs. Wei said, and should not drink it. Zheng Chaoshan saw her hesitant and took the quilt in Qin Zhaodi’s hand, drank the water in the glass in one breath, and then called noon Don’t eat in the cafeteria, leave home after cooking and eating.
Hao Pingchuan found the owner of the half fingerprint. The owner of the fingerprint was Niu Wangdi. The three generations in the family were black kidnappers. Zheng Chaoyang and Bai Ling rushed to Tianjin to investigate Niu Wangdi. Several people later found Niu Wangdi and his associates in Tianjin. Many people found that it was a man named Li Baye who sent Niu Wangdi and others to Peiping, and gave Zheng Chaoyang a portrait of Li Baye. Zheng Chaoyang looked at Li Baye’s portrait, and immediately recognized that Li Baye knew himself. He was actually the driver’s surnamed Dou next to Wei Qiao.
Zheng Chaoyang then hurried back to Beiping with Bai Ling, but found that the surnamed Dou had resigned for several days. Zheng Zhaoyang came to Wei Qiao’s house to inquire about the surnamed Dou, but Wei Qiao was vague and said only some basic news of the surnamed Dou. Wei Qiao secretly found the surnamed Dou, let him leave Beijing, and told him not to contact Zheng Chaoshan. After Wei Qiao came out of the hiding place of Dou, he didn’t know that he was stared at by Yang Mou. This disguised Yang Mou was Lao Yang. Zheng Chaoyang gradually figured out the identity of the driver Dou, and then let Hao Pingchuan go to Wei Qiao, who had a close relationship with the driver Dou.