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.

China views its rare earths as a national security issue, not a trade one, and that’s why Beijing is unlikely to loosen controls anytime soon, experts say.

President Donald Trump said his Chinese counterpart Xi Jinping had agreed to restart the flow of rare-earth materials, as negotiators from the two nations prepare to resume trade talks on June 9 in London.