On September 23rd, someone tried to assassinate Song Ziwen at Shanghai Railway Station. At that time, he was wearing a Panama hat and became an obvious target. He threw his straw hat aside and hid behind a steel frame in the crowd. He survived. But his secretary, Tang Tanlu, was killed. The murderer escaped. On that day, Song Ziwen and Tangtan Road are going to take the early train to Shanghai Railway Station. Unfortunately, the dress of Tangtan Road is very similar to that of Song Ziwen. After they arrived at the railway station by bus, Tangtan Road got off first and walked to the railway station. Then suddenly someone released a smoke bomb, and then a piece of smoke dispersed. At this point, Song Ziwen had got off the bus, but when he saw the smoke bomb, he immediately hid. At the same time, there was a gunshot in the smoke, and Tang Tanlu fell to the ground.

After the incident, the driver and Song Ziwen immediately sent Tangtan Road to the nearest German hospital. At that time, Tangtan Road was shot in the bladder a lot, and the situation was very critical. However, the doctor from the hospital didn't come. Finally, when the German doctor was ready to go to the operating table, Tang Tanlu had already passed away. The assassination shocked Shanghai. At that time, many rumors said that Tang Tanlu was killed because he took a bullet for Song Ziwen. In fact, people familiar with the matter know that Tang Tanlu was killed by mistake, because his clothes are very similar to those of Song Ziwen. Song Ziwen was assassinated by Wang Yaqiao, and Dai Li actively solved the case. Song Ziwen, who survived, agreed to Dai Li's request.

Tang Ying, the elder brother of a Shanghai celebrity, is a good friend of Xu Zhimo and Lu Xiaoman. His father, Tang Naian, was one of the first overseas students to receive compensation from the Boxer Rebellion, and also the first overseas students of western medicine in China. After returning to China, he became a doctor in beiyang fleet, and later opened a private clinic in Shanghai to visit the extended family in Shanghai. Therefore, Tang Jia is very rich. Tang's sons, Tang and He, are long-term good friends. They not only studied together in the United States, but also worked as secretaries in Song Ziwen after returning home. Song Ziwen was assassinated by Wang Yaqiao, and Dai Li actively solved the case. Song Ziwen, who survived, agreed to Dai Li's request.

In Tang's view, politics is not a good career, so Tang Naian and his wife are not optimistic about their son's career. But Tang Maolu didn't take his parents' words to heart. He is not only closely related to Song Ziwen, but also serves as Song Ziwen's secretary. Because of this, he lost his life when he was young. Song Ziwen was assassinated by Wang Yaqiao, and Dai Li actively solved the case. Song Ziwen, who survived, agreed to Dai Li's request.

The case caused a sensation in Shanghai. Dai Li was ordered to investigate the case. 1April, 934, an informant contacted the secret service Shanghai station and announced the murderer's situation. Dai Li immediately sent two of the best spies, Shen Zui and Cheng, to investigate the case. "Eyeliner" took them to northern Jiangsu, and the suspect was a security guard in Yancheng. With the help of the eyes, they tricked him into the boat and arrested him for questioning. According to the verdict, the man confessed that he was ordered to "assassinate the king" Wang Yaqiao. He also confessed another accomplice: Song Ziwen's former driver, who now works in a machinery factory in Yangzhou, has been arrested. After they were brought back to Shanghai, Dai Li showed Song Ziwen the photo of the second man. Song not only affirmed the identity of the driver, but also offered a reward of 5,000 yuan to catch the drunk. But at Dai Li's suggestion, he returned the check to Song, saying that they had a responsibility to protect the minister. Song Ziwen was assassinated by Wang Yaqiao, and Dai Li actively solved the case. Song Ziwen, who survived, agreed to Dai Li's request.

Since then, Song Ziwen has owed Dai Li a lot of money. Later, with the permission of Chiang Kai-shek, Dai Li withdrew the funds of the Central Bank from Bai Songsun, president of Shanghai Branch. As long as he has Chiang Kai-shek's cops, he doesn't have to go to the Ministry of Finance for any formalities. Dai Li got Song's signature through the Ministry of Finance. Since then, as long as Dai Li has a request, Song Ziwen will almost always agree.