This is the Japanese equivalent to Belsen or Auschwitz but with added macabre twists to the methods of human experimentation and extermination.
Whilst of specialist interest to only a few it is worth noting its existence.
Unit 731 was part of Japan's Kwantung Army with headquarters in Harbin, capital of Heilongjiang, in 1932. It is notorious for manufacturing materials for germ warfare.
The Kwantung Army headquarters burned and buried its records of Unit 731 in an attempt to get rid of evidence just before Japan surrendered on August 15, 1945.
According to historical records available, Unit 731 experimented on more than 10,000 prisoners of war and civilians from China, the Korean Peninsula, Mongolia, and the former Soviet Union.
Many Chinese, Korean, American and British prisoners were also held there and it does represent a sequence of world war two history as yet almost unpublicised.
The base is about 10km out of town in Pingfangqu district.
For further reading on this, you must read Liam D'Arcy Brown's book, Green Dragon, Sombre Warrior: Travels to China's Extremes
In WW2 Japan occupancy north-east China. They had a lab for human test. That is the wound of all Chinese. But I think, history must not forget, but to forgive.