Visitors view a memorial wall on which names of the Nanjing Massacre victims are engraved at the Memorial Hall of the Victims in Nanjing Massacre by Japanese Invaders in Nanjing, capital of east China's Jiangsu Province, March 30, 2013, ahead of the Qingming Festival, or Tomb Sweeping Day, which falls on April 4 this year. [Xinhua/Xu Yijia]