On August 12, the 731st Unit Criminal Evidence Exhibition Hall of the Japanese Army invading China released the “Personal Declaration” file of the former 731 Army Hailar Detachment. The file shows that the Japanese invading China used the name of conventional infantry to cover up germ warfare crimes, and reveals historical details of the Soviet Union's continued prosecution of Japanese bacterial warfare crimes after the war. Jin Shicheng, a researcher at the Crime Museum of the 731st Army invading China, said that the study had two major findings. First, it was revealed that the Japanese military used the name of infantry to cover up germ warfare crimes, such as recruiting personnel under the guise of regular infantry forces such as the 97th Force, 177th Force, and 201st Force in Manchuria, and then assigning them to the Hailar Detachment after 3 months of training at the 731 Force Headquarters. This recruitment method is clearly deceptive, and the purpose is to cover secret criminal acts such as human experiments carried out by the 731 Force. Second, it confirmed the continuity of the investigation of Japanese military bacteriological warfare crimes after the war. According to records, 145 of these 156 people were arrested and detained in the Soviet Union by the Soviet army after the war. 4 of them were tried in Khabarovsk between April and September 1950. This clue confirmed that the Soviet Union's investigation and judicial prosecution of Japanese bacteriological warfare crimes continued to advance even after the public trial conducted in 1949. Experts said that the Hailar Detachment's “Personal Declaration” deepened research on the 731 unit issue and formed a chain of evidence with the oral testimonies obtained earlier from the former team members. This official file unravels the Japanese military's disguise to cover up crimes against humanity, further confirms Japan's national criminal system of waging germ warfare, and has important supplementary value for strengthening the 731 Troops' criminal evidence research and post-war trial history research.

On August 12, the 731st Unit Criminal Evidence Exhibition Hall of the Japanese Army invading China released the “Personal Declaration” file of the former 731 Army Hailar Detachment. The file shows that the Japanese invading China used the name of conventional infantry to cover up germ warfare crimes, and reveals historical details of the Soviet Union's continued prosecution of Japanese bacterial warfare crimes after the war. Jin Shicheng, a researcher at the Crime Museum of the 731st Army invading China, said that the study had two major findings. First, it was revealed that the Japanese military used the name of infantry to cover up germ warfare crimes, such as recruiting personnel under the guise of regular infantry forces such as the 97th Force, 177th Force, and 201st Force in Manchuria, and then assigning them to the Hailar Detachment after 3 months of training at the 731 Force Headquarters. This recruitment method is clearly deceptive, and the purpose is to cover secret criminal acts such as human experiments carried out by the 731 Force. Second, it confirmed the continuity of the investigation of Japanese military bacteriological warfare crimes after the war. According to records, 145 of these 156 people were arrested and detained in the Soviet Union by the Soviet army after the war. 4 of them were tried in Khabarovsk between April and September 1950. This clue confirmed that the Soviet Union's investigation and judicial prosecution of Japanese bacteriological warfare crimes continued to advance even after the public trial conducted in 1949. Experts said that the Hailar Detachment's “Personal Declaration” deepened research on the 731 unit issue and formed a chain of evidence with the oral testimonies obtained earlier from the former team members. This official file unravels the Japanese military's disguise to cover up crimes against humanity, further confirms Japan's national criminal system of waging germ warfare, and has important supplementary value for strengthening the 731 Troops' criminal evidence research and post-war trial history research.