When Japan invaded China in World War II, it set up an experimental Department of bacterial biochemical weapons in China, where the Japanese conducted live experiments with Chinese people to carry out bacterial colonization and bacterial weapons development. The 731 History Museum (free admission) was built at the original site of Unit 731. It shows us that the Japanese army committed crimes in China. The life-long injuries suffered by some surviving victims can not be forgotten. I hope you will cherish the precious peaceful years and work hard for the strength of our motherland all the time.