How best to apply in China for OZ tourist visa (600) <3 months stay?

INTRO

My girlfriend (Chinese) and I both live in China and we intend to return to Australia for 1.5 weeks to spend Christmas with my family. My girlfriend will have to apply for a (600) Tourist Visa to gain entry (min stay 3 months?). We both have full time jobs here in China. I have been living in China for the past 3.5 almost 4 years. I haven’t lived (paid tax) in Australia since 2006 so you could say I am a permanent expat!

One question we want to get out of the way before we apply.

DILEMMA

Her salary isn’t soo high and she doesn’t have too much savings either – so it would mean that I will have to fund her stay (ie lend her money) we are thinking $3000-$4000AUD for 12 days travel looks more than enough. Pretty generous aren’t I?, Plus she has her own VISA credit card. We have all the documents from her company (asking her to return after the end of her holiday - annual income, proof of registration at her residential address in China). She could also have a copy of her return ticket if you think that would help...I guess we are concerned that if I say that I am funding her (an Aussie boyfriend) that could be misconstrued as trying to help her to come live in Australia?! Would it be better if a friend of hers funds her stay from China? We can’t really use her family ties (ask her family) as they don’t know she is going to Australia and we would like to keep it that way. I also read you should show as much your ‘family ties’ back in your home country… What does that mean? List their addresses, what other proof can you provide? We don’t own assets (house or whatever) here in China, is that what that means. He parents do though, but I thought that would have nothing to do with her application. Its also too late to invite her from Australia (by my mother) or something.

SHOWING PROOF

The fact that I have no intention of returning to Australia permanently and have everything in China (inc. my girlfriend) would that affect her application favourably? How can you show proof of that in the application without simply writing a long winded story that would probably be laughed at by the immigration officer in charge of the application!

OR

The second riskier option, not say anything and just hope they don’t question that sudden cash injection in her monthly bank statement?! That was what we thought would be the best originally. But I think since China is a high risk country I would think the authorities are smarter than that and could delay the application, maybe ask my girlfriend to explain that particular transaction…..And we don’t have that much time to be honest. Travel agents here in China say they can help with the visa application but demand such high fees and want too much in her savings - we simply cant afford their scamming behaviour.

Any feedback would be greatly appreciated!!!

Cheers