Photo taken on Jan. 7, 2013 shows a newfound report on Feb. 19, 1938 about public order in Nanjing by the military police of Japan's Central China Expeditionary Army in Changchun, capital of northeast China's Jilin Province. Two newfound reports show that the population of Nanjing reduced from 1,130,000 to 345,000 during the two and a half months before and after the Nanjing Massacre. At least 300,000 Chinese were killed over the course of six weeks by Japanese invaders after the soldiers occupied the city of Nanjing in east China's Jiangsu Province on Dec. 13, 1937. [Xinhua]