Eighty-three years ago, Japanese invaders took the lives of more than 300,000 people in the span of six weeks in the eastern Chinese city of Nanjing. December 13 marks China's seventh National Memorial Day for the Nanjing Massacre Victims. A ceremony is underway at the Memorial Hall of the Victims in Nanjing Massacre by Japanese Invaders to remember the victims of Japanese aggression during World War II. Join CGTN's special coverage for more.