Donald Trump has been criticising China on Twitter.
The US president-elect says the country didn't consult America on monetary policy or on building a military complex in the South China Sea.
Did China ask us if it was OK to devalue their currency (making it hard for our companies to compete), heavily tax our products going into..— Donald J. Trump (@realDonaldTrump) December 4, 2016
It is the second time he has risked a diplomatic row in recent days.
their country (the U.S. doesn't tax them) or to build a massive military complex in the middle of the South China Sea? I don't think so!— Donald J. Trump (@realDonaldTrump) December 4, 2016
China's lodged a formal complaint over a call between Mr Trump and the leader of Taiwan - which Beijing sees as a breakaway province.