Over 2,000 relics testifying the crimes committed by the notorious Japanese germ warfare unit, Unit 731, are being exhibited for the first time in Harbin, northeast China's Heilongjiang Province.
The relics were mainly found at a core area dedicated to the unit's bacteria tests and human experiments.
Unit 731 demolished the core area in August 1945, when Japan announced its surrender in World War II.
Researchers have tried to unearth more valuable evidence through archaeological excavations.
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