Apophenia,
Thanks very much for the link to the side drawing. That is a great start.
I was aware that China received several of these aircraft, having download that article some time ago. But my interest in this aircraft began in earnest when reading documents from USAAC Material Command about one being given to the Air Corps for testing in 1930. It apparently flew nicely but was completely inadequate in its load, etc. Besides, the Air Corps had already accepted the design for the Curtiss A-8 monoplane in 1929 and was getting away from biplane attack aircraft altogether.
AlanG