Surprising absolutely nobody (except maybe the President of the United States), China is retaliating on Trump’s Chinese aluminum and steel tariffs with 15% tariff on American fruits and nuts (China is the third largest importer of such items, or at least has been) and 25% on pork and other goods (the US sold $1B in pork products to China last year).
There are certainly legitimate concerns over China’s steel and aluminum exports to the US, but starting a trade war over them is not going to be terribly productive. Maybe some of those farmers who thought Trump would be great for their business might want to give the White House a call about it.

This oughta rock the market.
Australian farmers send a vote of thanks …
+L Gorrie "Breaking News: Turnbull joins trade war against China."
After all, there's still a lot of
hostagesasylum seekers on Nauru and Manus.+Travis Bird You gotta link to corroborate that?
+Stephen Waterhouse It was meant as a joke. Although it could be a prediction.
+Travis Bird I was just wondering because at first he said Australia would join in a trade war against America unless his country got an exemption from tariffs on steel and aluminum – which Trump then gave him, only to fume soon after that that exemption was in trouble. And by this point I've lost track . . . .
+Stephen Waterhouse those of us who live here have lost track …