 Three aircraft and 32 sets of components were ordered from the USA.The factory at Loiwing worked until April 1942, when on account of Japanese attacks it had to be evacuated to Kunming, while its American personnel set up shop in India.From 1943 to 1946 the aircraft factory, which was dispersed in the ravines neighboring Kunming, assembled an experimental series of nine fighter monoplanes, probably from components of the Hawk 75M and 75A-5, and CW-21.