Comment by maxglute

West had nothing to teach/copy in many cases - there's a reason PRC produced magnitude more mining engineers for decades. Leaching MREE/HREE from ionic clays is a geologic tech stack that PRC fully built out indigenously from 60s. Only reason M/HREE can be refined at _scale_ and _economically_ today was PRC innovating on geology west never bothered in (west ree stack concentrated on hard rock extraction), and now west has to try to replicate via first principles.