Analysis of information sources in references of the Wikipedia article "Japanese aircraft carrier Kaga" in English language version.
On 7 September three Type 96 (A5M) fighters led by Lt. Igarashi escorted six Type 96 (D1A2) carrier bombers from the Kaga... they were intercepted by a three-aircraft formation of Curtiss Hawk IIIs led by Lt. Lu Ji-chun, Lt. Lai Ming-Tang and Chou Geng-Hsu near Tai Hu. Lu and Chou attacked the bombers and claimed one each... they were then engaged by the A5Ms and tangled with them for half an hour before all breaking off... while Igarashi claimed "three Hawks" and PO1c Handa claiming one, none of the Chinese fighters were actually lost in that engagement.