Visitors view the portraits of victims at the memorial for "comfort women" in Nanjing, east China's Jiangsu Province, Dec. 1, 2015. A memorial for "comfort women" during World War II opened to the public in Nanjing on Tuesday. It is the first memorial in China's mainland dedicated to the group, and was identified by the victims as a military brothel run by the invading Japanese more than 70 years ago. (Xinhua/Li Xiang)