A visitor presents a bunch of flowers in front of the "wailing wall", on which 10,311 names of the Nanjing Massacre victims are engraved, during a memorial ceremony at the Memorial Hall of the Compatriots Murdered in the Nanjing Massacre in Nanjing, capital of east China's Jiangsu Province, April, 4, 2012. People on Wednesday paid homage to the victims of the Nanjing Massacre committed by Japanese invading troops in 1937 on the occassion of the Qingming Fesitval, Tomb-sweeping Day. [Xinhua]