I didn't know Yuengling was in China but I don't know it's at the Promenade Refreshments and at the Fife and Drum Refreshment stand in World Showcase too.
Yuengling seems to be the "cool beer" right now. Not too many people have heard of it so it comes in and everyone thinks it's the best beer around simply because it's different. This happened a few years ago when Rolling Rock (another Pennsylvania beer) was the big thing. Heck, I was even charged for a foreign beer once when I ordered a Rolling Rock (not at Disney World).
I just think it's a ploy to try and get everyone to spell Yuengling correctly. Next thing you know, we'll all have to spell Schuykill and learn how to pronounce it (if you are not from PA, don't worry about that last comment).