Tarriffs

You may remember that Donald Trump's concern was China for which he imposed his tariffs on steel and aluminium.

It has been quite a while now since Trump trumpeted his French horn against the Chinese.

However, the odd thing is that the EU has taken very unkindly to Trump's venting of tariffs on China:

http://www.xinhuanet.com/english/2018-04/29/c_137145894.htm

Does anyone know the meaning of what is really going on here?

It escapes me why the EU is so upset!