If China is that big of a threat, why didn’t Australia buy both kinds of submarines instead of just the nuke ones? I’m sure they could cut a good deal with the UK/USA/French to get all the subs they want – they will be needed if China decides to stop playing nice. Hopefully they will, going to war with your best customers makes little sense – China’s economy would collapse without the West’s markets to sell to. Who do they think will buy their products? A broken Russia? A debt ridden Africa or South America? North Korea?