Possibly Corydalis sheareri or C. mucronata? In "Bleeding Hearts, Corydalis and their Relatives", Tebbit, Liden and Zetterlund. Of C. sheareri there is a picture as Plate 83 saying ""......is proving to be an amenable garden plant, even in areas with hot, humid summers, and has been sold by the Chen Yi nursery under many different names"""".