Xi Jinping used his final meeting with outgoing president Joe Biden to lay out four “red lines” that Washington must not cross and warned Donald Trump against pushing on the guardrails of US - China relations.

Donald Trump has made a tougher stance toward China central to his pitch on foreign policy, even as Joe Biden and Xi Jinping sought to lower tensions before the next president takes office.

Without mentioning President-elect Donald Trump's name, Chinese President Xi Jinping appeared to signal his concern that Trump's protectionist rhetoric on the campaign trail could send the U.S.-China relationship into another valley.