The thing is you need to find a way to disable the barriers and (most, not all) of the anti-dragon zones. I won't spoil it for you, but.......well explore the area more. IMO that's the fun of the game, after all.
However, I do agree that a (complete) walkthrough would be great, because I love to replay RPG games with cheats and complete walkthrough, to make sure I get every quest and every item.
I found a (mediocre) walkthrough on a Chinese web site that's not too difficult to understand if you use Google translate.
