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People strike a bell during a memorial ceremony at Shanghai's Songhu Battle Memorial Hall in Shanghai, east China, Dec. 13, 2019, on the occasion of China's National Memorial Day for Nanjing Massacre Victims. (Xinhua/Chen Fei)
People strike a bell during a memorial ceremony at Shanghai's Songhu Battle Memorial Hall in Shanghai, east China, Dec. 13, 2019, on the occasion of China's National Memorial Day for Nanjing Massacre Victims. (Xinhua/Chen Fei)