Preview Gas masks, Unit 731, Japanese Germ Warfare Experimental Base, Harbin, Heilongjiang, China, Asia Image ID: 1184-11496 Artist: Michael Runkel Purchase a commercial license Buy framed prints & more from our print store travel destinations travel horizontal color image indoors day no people china asia gas mask unit 731 japanese germ warfare experimental base harbin heilongjiang travel destination tourist destination tourist destinations nobody no one no person indoor inside daytime