Photo released on Sept. 10, 2015 by the State Archives Administration of China (SAA) on its website shows an excerpt from Japanese war criminal Goro Nakamura's written confession. Nakamura from the Aichi Prefecture, who joined the war of aggression in 1942, wrote in a confession in 1954 that they "used Chinese people to test the effectiveness" of poison gas. At one point, a Chinese war captive "became unconscious five minutes later" after he was pushed into a room full of "Type-98" poison gas cannisters. He also wrote that while at a village in north China's Hebei Province, after finding a tunnel under an old woman's house, he "dragged her to the entrance, pushed her into the hole, ... filling it with straw, I lit it myself with a match and burnt the old woman alive." The document is the last one in a series of 31 written statements by Japanese war criminals published on the SAA website to mark the 70th anniversary of the end of WWII. (Xinhua)