Li Chen, a Japanese abandoned chemical weapon victim, shows a surgery scar during a hearing event in Harbin, capital of northeast China's Heilongjiang Province, April 29, 2014. Five Japanese lawyers and ten of their Chinese counterparts held a hearing on Monday and Tuesday in Harbin and talked with 12 victims of chemical weapons abandoned by Japanese invaders, notably by Unit 731, a chemical and biological warfare research troop of the Imperial Japanese Army during World War II. The lawyers hope evidences could be collected to assist the victims in their court appeals. [Photo by Wang Song/Xinhua]