China is expanding the list of rare earth elements under export control and is adding curbs on manufactured products that have used Chinese refining and magnet-making technology, in a move that further tightens China’s dominant control of critical materials. Holmium, erbium, thulium, europium, and ytterbium are now also part of the export control list, for which foreign entities must seek licenses from the Chinese authorities to import. China’s Commerce Ministry said on Thursday that companies connected to foreign militaries or placed…