A man mourns vicitims at the Memorial Hall of the Victims in Nanjing Massacre by Japanese Invaders during the World War II in Nanjing, capital of east China's Jiangsu Province, Dec. 11, 2012. A series of memorial activities will be held to commemorate the 75th anniversary of the Nanjing Massacre that left some 300,000 Chinese dead when the Japanese occupied Nanjing on Dec. 13, 1937 and began a six-week massacre. [Xinhua]