"China and the US will both gain by cooperating, and lose by fighting," Xi told Donald Trump.

Chinese President Xi Jinping called for cooperation in a phone call with Donald Trump on Tuesday, confirming he would meet the US leader at the G20 summit amid a bruising trade war.

"China and the US will both gain by cooperating, and lose by fighting," Xi told Trump, according to a readout by Chinese state broadcaster CCTV.