UNESCO's International Advisory Committee started to review the documents related to the Nanjing Massacre as well as archives on "comfort women"－those forced to be sex slaves for Japanese troops during World War II on Oct 4.

In June last year, China announced that it was sending an application to UNESCO to list documents concerning the 1937 Nanjing Massacre and the suffering of "comfort women" as part of the organization's Memory of the World program.

The Nanjing Massacre refers to the invasion of Nanjing in East China's Jiangsu province in 1937, during which Japanese troops killed an estimated 300,000 disarmed soldiers and civilians in a rampage of rape, murder and looting.