Well, no. China is food-safe in calories. Not in dollars, because China produces less expensive food than they import. While yes the raw materials are current

Well, no. China is food-safe in calories. Not in dollars, because China produces less expensive food than they import. While yes the raw materials are currently imported from Australia, in war-time they would be imported from Russia and Central Asia. Preparations are being made right now to facilitate this. China is also #4 in iron ore reserves, they just aren't as economical as Australia's. Of course that doesn't matter much in wartime.