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.

Global manufacturers have raised the alarm on China's decision to curb exports of rare earths alloys, mixtures and magnets. Here is an overview of rare earths and China's measures: WHAT ARE THEY? Rare earths are a group of 17 silvery-white elements.

Beijing has approved more export licenses for the critical minerals and magnets in recent days, but supplies remain scarce and factories in the West are running out.