Han Lu turned a deaf ear to Chen Jiaping's advice. She risked her life and returned to her original house. She received a call from Jiang Zhaoguo and wrote down the address he mentioned in her book, but there were only three words: Foch Road. Feng Qi, who was waiting for help, caught Han Lu and brought her back for interrogation. Taking advantage of Liu Wuchang's absence, Zuo Shuangtao knocked Xiao Wu unconscious, but found that Xiao Wu did not have the key. She saw the radio station and thought of using it to send a distress message to the high-frequency radio station. Zhao An interrogated Han Lu. After he got Jiang Zhaoguo's photo, he realized that Han Lu had found someone to pretend to be Jiang Zhaoguo to disrupt the view, so he arranged for Feng Qi to guard her home, and then captured Han Lu. Even if Han Lu doesn't confess, Zhao An will still have a way to find Jiang Zhaoguo who is hiding. By then, Han Lu will only have a dead end.
After receiving the telegram, Gao Fang quickly rushed to the river and found Zuo Shuangtao trapped on the boat. He was about to help Zuo Shuangtao when Liu Wuchang came back. Zuo Shuangtao and Gao Fang jointly handed over the gun on Liu Wuchang and asked him to hand over the key. Zuo Shuangtao then used the key to open the chain and left with Gao Fang. After the hotel attendant discovered that Han Lu was missing, he immediately told Chen Jiaping and Liu Cheng about it. The two decided to go to Han Lu's home to look for clues. When they saw the messy home and the torn phone line, Chen Jiaping speculated that Han Lu had returned. Home is waiting for an important call. With the help of Gao Fang, Zuo Shuangtao obtained the code book and used the radio to send a telegram to his superiors. Due to the principle of confidentiality, Gao Fang took the initiative to say that he was going to work.
Two knives searched Foch Road but could not find Jiang Zhaoguo. Zhao An risked being shot when he went to report to Kimura Kenzo, but he held a gun to his head for a long time. As soon as he came back, he went to interrogate Han Lu, but Han Lu still refused to explain. Feng Qi was about to attack Han Lu with a knife when Luo Guanqun came to stop him with Lieutenant Colonel Naoki Uchida of the Military Police Headquarters Security Division. Uchida took Han Lu away from Zhao An, and Chen Jiaping took the opportunity of Han Lu's signature to obtain important information from Han Lu about No. 72 Albert Road and two o'clock in the afternoon. Zuo Shuangtao took a rickshaw back to the vicinity of Taihe Trading Company and saw Han Lu signing an autograph for Chen Jiaping from a short distance away. Luo Guanqun called Chen Jiaping over, gave him two photos, and asked him to try to find the Japanese in the photos.
Feng Qilai and Chen Jiaping applied for work-related injury recognition. Chen Jiaping said that this was a private act between him and Zhao An and did not count as a work-related injury. Feng Qi also wanted to reason with him, but Zhao An talked him away with a few words. Zuo Shuangtao returned to the trading company and made a fuss on the roof about jumping off the building, explaining why she came back. Chen Jiaping planned to get off the donkey along the slope. Zuo Shuangtao must have already thought of a reason when he came back. Lao Lu gave the secret letter that Chen Jiaping got to the organization for deciphering, and found that the letter was very valuable. It was sent by Dayan, a military spy lurking in Yan'an. The content of the secret message was about the economic and financial situation of Yan'an, and it was not top secret. However, since Yamashita attached so much importance to this secret letter, he should have attached great importance to the agent codenamed Dayan.
Zuo Shuangtao covered up the reason for his return with a few words, avoiding the important and ignoring the trivial. Chen Jiaping could tell that she wasn't telling the truth, and he didn't ask to the end. From the bottom of his heart, he is still very happy that Guoguo is back, although this happiness will be accompanied by many dangers in the future. Chen Jiaping was also a little worried. He was worried that Lao Lu would bring up the matter of asking him to leave again.