I'd like to thank everyone for their help. The information posted in this forum has helped me locate the manufacturer of the Y-10: Shanghai Aircraft Manufacturing Factory, a division of Shanghai Aviation Industrial (Group). This is the same company that manufactured MD-83s under licence for CAAC; nowadays, they manufacture components under subcontract for several Boeing airliners. Unfortunately, the two Web sites I located only give passing mention to the Y-10, which first flew on September 23, 1980.
As for the very intersting photo submitted by Jet Setter, I was wondering whether the plane was photographed on the ground then cut out and superimposed on a background of sky and clouds. This might explain the unusual attitude of the rudder, and for public relations purposes, an aircraft always looks better in its element, especially when plagued by CG problems! The pictures I recall seeing were in one of the Jane's aviation yearbooks (no longer published). The first was a ground shot; the plane looked like a Convair 880 (even though the Y-10 had six-abreast seating) with a Boeing B-17 windshield and 707 engines and pylons. The second depicted a male factory worker (no Vanna White here) showing off the interior, which was a rather drab baby blue affair with hatracks and passenger service units resembling those of the Dassault Mercure. How I wish I could get hold of those photos now!
The aeroplane has unveiled for us the true face of the earth. -Antoine de Saint-Exupery