A slight thread drift about buying from Chyna.
My father recently purchased some so called knock off Ryobi 7 Amp Hour batteries for some power tools from an address in Sydney through ebay. Long story short, they did not last as advertised and were lighter than the standard battery. A bit of a ding dong email battle with the seller and he eventually received a full refund and kept the two batteries so the seller did not receive a bad online rating.
So he pulled one apart and sure enough half the batteries were missing. So a typical student from Chyna, sponsored to study in Australia, as long as you run a business for your sponsor whilst here.
Not tarring the brush of all international students but just aware.