Hey anyways who needs to have aviation knowledge when the only thing they teach is how to memorize the questions ? It's not that hard to go all over the questions of the book and give the answers listed ! Even a chinese could do it, well actually only a chinese would do it !!!
hahaha
In China as you know (as we experienced it ourselves down south first hand), you don't even need a license to operate as a dispatcher or worse, a controller ! So for sure you don't need any knowledge to give GS instruction.
This place is just a big ass joke !
Good luck and take care !
Larry