After Bai Minghan helped Lai Guangrun change the medicine, Lai Guangrun casually asked about a letter he left behind last time he came here for acupuncture. Bai Minghan didn't know anything about it. In fact, he burned it after reading it. When Bai Hui came home from get off work, Lai Guangrun didn't ask any questions. Pang Hongmei and Chen Dongsheng went through the murder of Zhang Ashui from beginning to end. Together with Lu Youshun's explanation, they analyzed that the murderer was an agent codenamed Gecko. The police found out that Xu Wenzheng's men were all killed before liberation, and only the codename "Ghost Owl" slipped through the net.
After getting off work, Bai Hui went to her room to look for the characters Ji Danyang gave her. Bai Minghan came to call her for dinner but didn't hear her. Bai Minghan didn't allow her to get involved in the matter, but he couldn't defeat her. The electrician discovered that the power outage on the day of the incident was not due to a short circuit at the switch, but someone had installed a device that delayed the power outage. Chen Dongsheng asked the electrician to simulate the operation of the delay device on site, and sent people to expand the scope of the investigation, including those who left the hospital before the power outage. After investigation, Lu Cheng and Bai Hui were among them.
Bai Hui stayed awake and only found half of the words in the threatening letter from the magazine. She came to the expert building to find Ji Danyang, but was caught by Pang Hongmei. Bai Hui had to tell Pang Hongmei the truth. Pang Hongmei was so angry that she gritted her teeth. She didn't expect that Ji Danyang actually concealed the note sent by the agent, and asked Bai Hui to secretly investigate the matter without telling her. She gave Ji Danyang a severe lesson. Ji Danyang just wanted to find out who the agent was as soon as possible. Pang Hongmei confiscated all the notes and magazines on the spot.
Chen Dongsheng sent people to investigate Lu Cheng and Li Guangming, but no abnormalities were found. Chen Dongsheng sent people to find people who had been teachers before liberation, especially those who were related to the instrument factory. Pang Hongmei reported to Chen Dongsheng about Ji Danyang's unauthorized actions, and Chen Dongsheng sent Pang Hongmei to continue investigating the matter. Bai Hui and Ji Danyang met unexpectedly, and told Pang Hongmei about confiscating the magazine and note. Ji Danyang was helpless. Bai Hui discovered that the characters were from an art magazine, and the borrower was Zhou Jun. Ji Danyang asked Bai Hui to Hui went to Xinhua Bookstore to buy an oil painting book, and Ji Danyang found a painting signed Zhou Jun.
Pang Hongmei went to the library to check the characters and found that the characters were magazines borrowed by Zhou Jun. Pang Hongmei asked Luo Jiangning to pull up a list of borrowed items within a month and found out that Zhou Jun had borrowed them seven times in total, and each time they borrowed art. Magazine, they had already found out that Zhou Jun had been dead for several years, and they couldn't guess who was pretending to be him. Ji Danyang handed the oil painting book containing Zhou Jun's paintings to Pang Hongmei and Chen Dongsheng. They immediately went to Lao Jiang for consultation. Lao Jiang saw that Zhou Jun's paintings were ordinary, but he was obsessed with the art of painting. Chen Dongsheng and Pang Hongmei went to art teachers in primary and secondary schools across the city to look for clues.
Lai Guangrun is a latent spy gecko. He was ordered to test Bai Minghan. Bai Minghan dealt with it skillfully. Kou Xuesong learned about this and determined that Bai Minghan was Ghost Owl, and wanted Snow Wolf and Ghost Owl to join forces to complete the Rock Plan. After Pang Hongmei confiscated the note and magazine, Ji Danyang was strongly dissatisfied with Pang Hongmei. Chen Dongsheng tried to persuade him and asked Ji Danyang for the riddle that Zhang Ashui said before he died. Ji Danyang couldn't guess it, so he asked He Xiwen for advice. He Xiwen blurted out that it was "Well" ", Chen Dongsheng sent people to check the wells near the homes of Masan and Zhang Ashui.
After Ji Danyang's unremitting efforts, all the English materials left by An Wenshan were finally translated. He Xiwen and members of the expert team congratulated him. Agent Ye Xia pretended to be a herb collector and came to deliver herbs to Bai Minghan. Bai Minghan accepted them on the spot. Before leaving, Ye Xia reminded him that there was a letter under the basket. Bai Minghan immediately opened the letter inside. Bai Hui suddenly came home from get off work, and Bai Minghan hurriedly hid the letter.
The police officers found a locked box in the Masanjia well, which contained four copies of the May Fourth meeting minutes. The police officers immediately handed the meeting minutes to Zhang Yan, who asked him to strengthen the protection of the expert team. Chen Dongsheng personally took people to check every room in the expert building, but no monitoring equipment was found.
The police officers checked the list of participants, including Lu Cheng and Li Guangming. Pang Hongmei took the initiative to investigate Lu Cheng. The clue to the riddle was provided by Bai Hui. Chen Dongsheng eliminated Bai Hui's suspicion and wanted her to return to the medical insurance team. Pang Hongmei came to send Han Yundong the results of Zhang Ashui's investigation. Han Yundong was not in the office for the meeting, so Pang Hongmei asked Lu Cheng to help transfer it. This was Pang Hongmei's way of testing Lu Cheng. Han Yundong returned the information to Pang Hongmei, and the seal showed no trace of movement.
Pang Hongmei asked Bai Hui to report to the medical insurance team as soon as possible. The two of them chatted lively. Seeing this scene, Ji Danyang couldn't help but make fun of them. Bai Hui revealed that she and Pang Hongmei were sisters. She also gave Pang Hongmei a red gold stone bracelet. Ji Danyang Danyang's eyes suddenly lit up. The main component of rutile is titanium, which is an important raw material for making nuclear submarine shells. Ji Danyang reported the matter to Chu Huaiqiu, who decided to find titanium ore based on rutile.
The secret letter was sent by Lai Guangrun. Bai Minghan came to see Lai Guangrun on time. Lai Guangrun insisted that he was the Ghost Owl and wanted to join forces with him to destroy the dripping project. Bai Minghan flatly refused, and Lai Guangrun threatened Bai Hui's life.