I'm planning a trip with my wife and parents to Shanghai around Oct 2013. (yes, I;m planning way ahead). I know you can't book tickets yet, so this is just advanced planning. The questions is I have 120k with BA, 120k with AS and 250k with AA. I would like to fly in J. I know you can book CX with all of those, as I under stand it you can't do one way tickets. But can I do an open Jaw departure of JFK-PVG and return of PVG to SFO or LAX. Also can I do a 4 night stop over in HKG on the way there? Thanks in advance for any help and Advice.