Students visit the Exhibition Hall of Evidences of Crime Committed by Unit 731 of the Japanese Imperial Army in Harbin, northeast China's Heilongjiang Province, Sept. 18, 2021. Unit 731 is a covert biological and chemical warfare research and development unit of the Japanese Imperial Army that undertook lethal human experimentation during World War II.Photo:Xinhua
Students visit the Exhibition Hall of Evidences of Crime Committed by Unit 731 of the Japanese Imperial Army in Harbin, northeast China's Heilongjiang Province, Sept. 18, 2021. Unit 731 is a covert biological and chemical warfare research and development unit of the Japanese Imperial Army that undertook lethal human experimentation during World War II.Photo:Xinhua
Students visit the Exhibition Hall of Evidences of Crime Committed by Unit 731 of the Japanese Imperial Army in Harbin, northeast China's Heilongjiang Province, Sept. 18, 2021. Unit 731 is a covert biological and chemical warfare research and development unit of the Japanese Imperial Army that undertook lethal human experimentation during World War II.Photo:Xinhua
Visitors present flowers to pay tribute to revolutionary martyrs at the Museum of the War of Chinese People's Resistance Against Japanese Aggression in Beijing, capital of China, Sept. 18, 2021. Various activities are held on Sept. 18 in commemoration of the September 18 Incident 90 years ago that marked the start of Japan's 14-year invasion of China. Photo:Xinhua
Visitors view exhibits at the Museum of the War of Chinese People's Resistance Against Japanese Aggression in Beijing, capital of China, Sept. 18, 2021. Various activities are held on Sept. 18 in commemoration of the September 18 Incident 90 years ago that marked the start of Japan's 14-year invasion of China.Photo:Xinhua
A bell-tolling ceremony marking the 90th anniversary of the "September 18 Incident" is held at the September 18 Incident History Museum in Shenyang, capital of northeast China's Liaoning Province, Sept. 18, 2021. Sirens sounded and a huge bell tolled in Shenyang on Saturday in commemoration of the September 18 Incident 90 years ago that marked the start of Japan's 14-year invasion of China.Photo:Xinhua
A bell-tolling ceremony marking the 90th anniversary of the "September 18 Incident" is held at the September 18 Incident History Museum in Shenyang, capital of northeast China's Liaoning Province, Sept. 18, 2021. Sirens sounded and a huge bell tolled in Shenyang on Saturday in commemoration of the September 18 Incident 90 years ago that marked the start of Japan's 14-year invasion of China.Photo:Xinhua