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A visitor views pictures at an exhibition of the Nanjing Massacre in south China's Hong Kong, Dec. 13, 2017, on the occasion of China's National Memorial Day for Nanjing Massacre Victims. (Xinhua/Liu Yun)
A visitor views pictures at an exhibition of the Nanjing Massacre in south China's Hong Kong, Dec. 13, 2017, on the occasion of China's National Memorial Day for Nanjing Massacre Victims. (Xinhua/Liu Yun)