Chairman Mao Tze-tung's Trident.
Oldwolf;
The Military Museum in central Beijing had for many years a Trident standing in the open just inside the main gate. It was Chairman Mao Tze-tung's private aircraft. The general public could go onboard and look through the cabin but the door to the flight deck was locked. I was there a couple of months ago and noticed the Trident was missing and as the museum main building is undergoing renovations they may have moved it inside. Or they may have given it to the China Aviation Museum so the only way to locate it is to go and ask the museum people. This Trident is possibly of the same type as the one that crashed so if you can get a look at it and compare its windows with your photographs the problem can be solved. If you want technical details of the fuel tanks etc the only place to go is the China Aviation Museum.
If you do decide to visit the China Aviation Museum send me a PM before you go. Regards,
O.P.