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Visitors stand in a silent tribute at the Memorial Hall of the Victims in Nanjing Massacre by Japanese Invaders when air raid sirens sound in Nanjing, east China's Jiangsu Province, Sept. 18, 2018. (Xinhua/Sun Can)
Visitors stand in a silent tribute at the Memorial Hall of the Victims in Nanjing Massacre by Japanese Invaders when air raid sirens sound in Nanjing, east China's Jiangsu Province, Sept. 18, 2018. (Xinhua/Sun Can)