Ma Qi took He Chunxiao to the post office, and gave his apprentice a training on the way: remember clearly who you have seen, what you have said, and where you have traveled, and you must retell it in full afterwards.Lin Kanshan was also checking the postal system. He called in the name of the census to ask about the situation, then went to the dormitory area to visit and found Fan Chen's residence based on the peach tree.

Lin Kanshan sneaked into the room to search. When he heard someone coming outside the door, he quickly hid in the inner room and left through the window.Ma Qi did not meet him when he entered the house, but He Chunxiao outside the house saw him.Lin Kanshan was well prepared, saying that he was accompanying Wu Jinhe to inspect the yarn-dyed knitting factory, and had made an appointment with Wu Jinhe to meet him nearby.When He Chunxiao saw his brother-in-law with his own eyes, he temporarily believed this explanation.

Ma Qi found a short hair in the dormitory and realized that someone had just come here. He immediately rushed to the post office, preparing to monitor Fan Chen first.However, He Chunxiao called the Security Section without authorization and reported his national security identity, which alarmed the target.Ma Qi could only rush in and chase the person immediately, and after a lot of dealings, he caught Fan Chen.The apprentice's mistake made him suspicious: Was He Chunxiao inexperienced, or did he intentionally remind the suspect?

The two had also encountered traffic inspections before.Ma Qi was in a hurry to do something, so he took a taxi and left first, leaving He Chunxiao behind who was driving.He Chunxiao therefore helped to divert traffic at the intersection for a day. He was not able to leave until his work unit contacted the traffic police to explain the situation.The situation that happened one after another made the relationship between master and disciple even more awkward.

After Fan Chen was arrested, he had a tough attitude and refused to explain.The National Security Bureau found out that he had been to the other side of the Taiwan Strait when he was young and was taken out of prison by the military intelligence department for manslaughter. Later, he returned to the mainland and worked in a state-owned photo studio before being transferred to the Post and Telecommunications Bureau.Investigators have obtained a piece of code paper that has not yet been deciphered, and Fan Chen has hidden the code and gold bars in an abandoned mailbox near the 761 Research Institute.Ma Qi judged from this that what the other party wanted was probably the core technology of missiles. However, there were many people in the institute, so it was necessary to continue to investigate who had the problem internally.

Zhu Yingjia learned that the person responsible for Cao Liaoping's front-line contact was arrested and immediately reported to Zheng Guiping.Zheng Guiping was furious and urged him to fill in the dock map and troop exercise information as soon as possible.When the National Security Bureau searched Fan Chen's room again, Jinlan found the camera from the box, and others found footprints outside the window, confirming that a third person had entered the house on the day of the crime.

He Chunxiao tried hard to explain his mistake, but Ma Qi was still worried.Jinlan saw him talking on the phone at the canteen again, felt his behavior was suspicious, and reported it to Wu Shenglai.Wu Shenglai reminded her that she needs evidence to suspect her comrades and cannot draw conclusions based on impressions.

At Ma Qi's request, He Chunxiao recalled the people he met in the past two days, and finally thought of Lin Kanshan again.He called Wu Jinhe and asked Wu Jinhe in a roundabout way. The answer he got was still consistent with Lin Kanshan's statement, so he did not continue to pursue it.

Lin Kanshan received a new task to find out the deployment of the Navy Pier and recent exercises.The next day, someone was stopped from taking photos near the military port. Another man standing far away saw the incident and left immediately.Clues from the sneak shots at the pier entered the scope of the investigation of the second department.

Jinlan took the initiative to change partners and wanted to handle the case with He Chunxiao. Li Huadong heard from the side and felt very disappointed.He Chunxiao tried to follow Ma Qi to practice the skills he had just learned, but was soon discovered.Ma Qi did not let him continue to follow, and instead arranged for him and Jinlan to investigate the photo taking at the pier.