A Chinese squad deployed outside Shanghai. Gas masks were standard issue, at least among the best Chinese units, and there were several reports of the use of gas on either side during the campaign, although it has proven a challenge to separate reality from propaganda.
Unknown photographer
Photo album (between p. 144 and p. 145) in Peter Harmsen, <i>Shanghai 1937: Stalingrad on the Yangtze</i>, Casemate, 2013.