1 / 4   Wei Shaolan, a Chinese woman who was forced into sex slavery as a so-called "comfort woman" for the imperial Japanese army during World War II, died on Sunday at age 99. /VCG Photo

2 / 4   Wei, who gave birth to a half-Japanese son and publicly admitted it, passed away at 1:20 p.m. in the city of Guilin, south China's Guangxi Zhuang Autonomous Region, on Sunday. /VCG Photo

3 / 4   Captured by Japanese soldiers in 1944 at the age of 24, Wei was forced to serve the Japanese military as a sex slave in a military brothel for three months before escaping from the facility. She found herself pregnant, with a boy of Japanese descent born later. The boy got a Chinese name and is now in his 70s. /VCG Photo  

4 / 4   An estimated total of 400,000 women in Asia were forced to work as "comfort women" for the Japanese army during World War II. Nearly half of them were Chinese. /VCG Photo