US President Donald Trump said Chinese leader Xi Jinping has agreed to restart the flow of crucial rare earth materials, after announcing a new round of US-China trade talks will be held in London on Monday.

Mr. Trump said in a post on Truth Social that his call with Xi Jinping, China’s top leader, had focused entirely on the trade relationship between the nations, which has soured in recent months in a dispute over the export of critical minerals used in an array of industries.

Donald Trump has said he will visit China after speaking to its leader Xi Jinping over the phone. The US president said he had reciprocated with an invite to the White House during the "very good talk" - though such a trip has not been confirmed by either side.