Sea freight from China to Australia like Sydney, Melbourne by Port to Port service takes about 15 days only, door to door service takes about 30-45 days considering of the export & import custom clearance, duties, boat loading & unloading, trucking.  Air freight from China to Australia door to door takes about 7-10 work days, in addition, you can choose FedEx,TNT, DHL,UPS and other international express delivery, the delivery time is about 3-7 days.