A collaborative oral history project on the Nanjing Massacre was signed by representatives from Chinese and US research institutes on Friday.

The oral histories of 30 to 50 survivors of the massacre will be released to the public over the next three to five years through a joint effort of two Chinese oral history research institutions and the USC Shoah Foundation's Institute for Visual History and Education in Los Angeles.

All of the survivors' oral histories will be recorded using international standards, said Zhu Chengshan, curator of the Memorial Hall of the Victims in Nanjing Massacre by the Japanese Invaders.