In January 1938, apprentice Luojin ,worked in Huadong photo-studio, took advantage of developing photos by Japanese soldiers, took risk of life danger, developed sixteen photos of massacring Chinese through self-shoot by the Japanese troops, bound up into volume and preserved them. Later these photos were preserved by his classmate Wuxuan. After the victory of anti-Japanese War, Wuxuan delivered the photo volume to Nanjing temporary council, then delivered to Nanjing War Crimes Military Tribunal in China as one of the Japanese invading massacre evidences.