Members of the press watch a documentary on confession from Imperial Japanese Army (IJA) war criminals during the 1949 Khabarovsk War Crimes Trials, which has been newly acquired by the Museum of the Imperial Palace of "Machukuo", in Changchun, northeast China's Jilin Province, May 7, 2018. The 22-hour-long audio record, provided by a Russian state-level audio archive, reveals the germ warfare atrocities of IJA's clandestine Unit 731 and Unit 100 in China. (Xinhua/Lin Hong)