Got it. So, the connection with the RCAF is there in that some 200 ex-RCAF Mosquitoes were purchased from Canada by the Chinese Nationalists in 1947 (not 1937 of course). These were mostly FB.26's and were overhauled at the Downsview plant before being shipped off to Shanghai. The insignia on the pictured aircraft as not that of the Nationalist Chinese Air Force but that of the No. 1 Bombardment Group. The FB letters indicate Fighter Bomber and the next letter might be a 1 since there is also a picture of "FB4".