7 I-16 fighters of the Chinese 24th Pursuit Squadron and 1 SB bomber of the Chinese 9th Bomb Squadron were ordered to intercept the incoming 25 Japanese G3M bombers at Lanzhou, Gansu, China. Bad weather forced the Chinese aircraft to land at Chung Chuan Chun Airfield, but upon sighting the Japanese bombers overhead the Chinese fighters were able to takeoff and shoot down one bomber and damaging another.
