Pingfan

Pingfan was a district in the Harbin in the days when the region was under the control of the Japanese puppet-state of Manchukuo. It was the headquarters of the Japanese Biological Warfare Unit 731 during the Japanese invasion of China and World War II. It had an airport, railway and dungeons. Most of Pingfang was burnt by the Japanese to destroy evidence but the incinerator where the remains of victims were burnt remains and is still in use as part of a factory.

Pingfan in "The War That Came Early"
After a mass prisoner escape, Unit 731 was moved to Pingfan. There the Japanese biological warfare unit conducted numerous experiments of prisoners of war, called "logs".

However, some prisoners escaped anyway, most notably Herman Szulc. This led to the demotion of a sergeant in the unit, Hideki Fujita.