Japanese advances in Burma in late-1942 forced the 1st Air Force Aircraft Manufacturing Factory (1st AFAMF) to move hinterland to Guiyang, Guizhou province, where the Chinese government was attempting an innovative and ambitious indigenously designed swept-forward gull-winged fighter plane called the XP-1, in hopes to reduce reliance on foreign sources. From 1943 to 1946 the CAMCO factory, which was dispersed in the ravines neighboring Kunming, assembled an experimental series of nine fighter monoplanes, probably from Hawk 75M, 75A-5, and CW-21 components. To a degree they were similar to the American prototypes and their further fate is unknown. In western sources the first example figures under the designation Chu X-P0.