Here are 2 sources:

1. http://raoulschinasaloon.com/index.php?topic=6623.0

The 2nd one...

2. http://www.eslteachersboard.com/cgi-bin/forum/index.pl?read=50097

With the 2nd one you have to go down the thread and read both sides of the story, then make the decision yourself.

Seems like Yangshuo has a lot of expats going there nowadays.