G'day mate, welcome. Slowly but surely we Aussies are taking over the world.
Mate hopefully there is a positive to this and your relationship will develop for when/if you have a chance to meet in 8 weeks, I do not consider this too fast, others may disagree with me, but at least you will not have to go to China, maybe surprise her with a book about her subject to show you care about her studies?
This is the very skeptical Jason coming across here, from reading your post maybe she did/is actually study in Australia before, therefore her English reading and writing will have improved so how does her letters read? Like someone who has at least a more than basic grasp of English grammar? Surely she would need this to hand in assignments? Therefore she would not need to use a translator, or maybe ask for Uni email address to send to instead of EMF's as she will have one of those and she can check this from anywhere including China. This maybe a clue or she maybe working for the agency as a translator now and stringing you along?
My views only of course, and good luck to you brother, let us know how you go.