OK, so I am FINALLY watching this. Since I officially have no life, at 19:24 it shows a photo shopped picture of 4 Chinese pilots in front of a Martin 139. The picture is of #1403 (msn 690) of the Chinese Air Force. This is the actual plane that dropped the leaflets mentioned early in the movie over Nagasaki (first Allied aircraft over Japan) on May 18 1938 but was flown by Captain Hsu Huan-sheng, the leader of the 14th Squadron.
Did I mention I have no life?????