Guan Guangjing, the oldest Nanjing Massacre survivor until his death on Sunday, works in his vegetable garden. [Xinhua]The oldest survivor of the Nanjing Massacre died on Sunday, and fewer than 100 survivors remain, the Memorial Hall of the Victims in the Nanjing Massacre said on Monday. State leaders will attend a public memorial ceremony at the Memorial Hall of the Victims in the Nanjing Massacre by Japanese Invaders on Wednesday. Guan Guangjing died at age 100 three days before the National Memorial Day for Nanjing Massacre Victims. [Xinhua]The National Memorial Day falls on Dec 13, and this year marks the 80th anniversary of the Nanjing Massacre.