**Protagonist**: Xu Mingzhang, a police doctor from the Ministry of Industry and Commerce Bureau of the Public Settlement (dual identity: the underground party of the Communist Party of China and the "White Paper Fan" of the Youth Gang)
**Scene**: Renji Hospital Emergency Room and Shiliupu Fish Market Cold Storage
The plague strain disguised as a cholera vaccine from Japan's 731 unit was stolen. Xu Mingzhang locked the Qingbang Pier through the fish scales between the dead man's fingernails. He found refrigerated test tubes of bacteria in a secret compartment of the operating table, but was surrounded by police from the French Concession. Under the guise of treating the Japanese consul's asthma, the bacterial strain was mixed into his inhalant medicine. At the same time, rickshaw drivers controlled by the Youth Gang were used to spread false epidemic news, triggering large-scale riots in the Japanese overseas community and undermining the germ warfare plan.
