Doc, glad to see you posting. You need to have a character at least level 85, and then you can pick up a quest from the Hero Board to talk to the King. He'll send you out to talk to an NPC in front of the castle who will tell you to board an airship and then the Panda fun begins.
You don't need to be a Panda to go.
"Dogs are not our whole life, but they make our lives whole." -Roger Caras