I think that the selling is just logical profit-taking. The "hype" is based upon the threat of the Chinese withholding exports of REM to the U.S. as the next round of the trade war. I think that it's a distinct possibility, given that they did that very thing to the Japanese 5 years ago over the seizure of a Chinese fishing boat in Japanese territorial waters.
Now, go back 5 years in the charts and see if you want to miss out on a move like that, especially given today's entry point.