By Siyi Liu and Dominique Patton – Reuters
BEIJING, Dec 21 (Reuters) – (This Dec. 21 story has been corrected to clarify that the ban was on the export of technology to make rare earth magnets and that the ban on technology to extract and separate critical materials was already in place, in paragraphs 1 and 6. It also removes context and the comment on rare earth processing operations, in paragraphs 3 and paragraphs 18-20)