I hadn't heard of the prohibition against picking up pre-ordered tickets at off-station booking offices until I saw this thread*, and I'm still somewhat dubious about this claim (official policies that don't make sense often get rolled back in short order) until someone comes forward and states that they tried (present passport and train number) and failed. BUT, if the policy in question is in force, it surely applies to the booking office at PVG (because there isn't a train station at PVG).

ETA: *I meant to say this thread: http://www.flyertalk.com/forum/china...n-station.html