Liang kind of works like Glurb does. Go to his Dragon Merchant Stand and he will ask you for items that you can sell him in exchange for pearls. He buys these items at the same price that Myra would buy them. He gives you a limited amount of time to get these items. Once you get some pearls you can buy dragons at the marketplace.
Once you sell him all your goods he will reward you and then he will take off in his hot air balloon to return again in 4 hours. The good thing about this over Glurb is that it will tell you what Liang is going to want to buy next time.
