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.

President Trump announced that President Xi Jinping has agreed to resume the flow of rare earth minerals and magnets to the United States, potentially easing trade tensions. This follows a recent call between the leaders and temporary export licenses granted to U.

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.