Bank transfer to China is $30 - youll need a mediatory bank to transfer to in USA as Aus doesnt deal in Yen, Youll also need info on who you are paying, their bank ( account and address), business address, telephone... i think thats it all covered, but each time i attempt to do it there is a piece missing.
WU can be done online and is $28.. youll need personal name to transfer to. WU will ring you to confirm payment - be warned - they have zero sense of humour, jokes and laughter at the ridiculous steps you go through are not permitted.
Money Gram goes in the post yes? - so is slow, but probably easier.

They can set up a Paypal account but it costs them quite a bit - some US$50

Once youve paid your man in China you will realise that the global economy is something others enjoy