The book's title carries two core implications, Jin explained. It symbolizes the classified core secrets and deadly human experimentation chambers of Unit 731, as well as the post-war backroom deal -- the United States acquired the Japanese unit's germ warfare data in exchange for covering up its heinous crimes.

　　This year marks the 81st anniversary of the victory in the Chinese People's War of Resistance against Japanese Aggression and the World Anti-Fascist War, the 80th anniversary of the opening of the Tokyo Trials, and the 77th anniversary of the 1949 Khabarovsk War Crimes Trials.

　　Attending experts said the new publication advances the study of the war history and facilitates evidence-based historical education for the public. Recognizing documented facts and reflecting on wartime atrocities lay a solid foundation for justice and lasting global peace, they added.