To be honest, China doesn't really represents any immediate threat to Australia. Though it could be a long term threat depending on how things play out in future and Australia alliance with U.S/NATO.
Indeed, China does not pose any immediate nor strategic threat to Australia, a major trading partner. That is why it is unfathomable why Canberra's recent defense posturation to instigate Beijing is being seen now; perhaps in time and as the election season dies down and with more foreign ministry exchanges , Australia will be influenced to take up a more cautionary tone , one that will be less instigative in nature.