We prefer Tokyo-Narita as the destination and use Haneda as alternative airport. I am now asking the colleagues working in ZBAA and ZSPD Tower to pass me the real FPL routes of ANA or JAL flights from/to China. Will forward the routes to you for double check soon.
P.S. Japanese flight-simmers are very very welcome to fly to China in the event (or any other Times :-). We will provide the charts and create a website for the event very soon.