Sea freight from China to Australia like Sydney, Melbourne, Brisbaneby Port to Port service takes about 14 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 5-10 work days, in addition, you can choose FedEx, DHL,UPS Express delivery, the delivery time is about 2-7 days.