Also reports of 25,000 more so 175,000 troops.
Thanks for confirming this is fake news.
From one of your links
“Was there any substance to the rumor? Not according to senior U.S. military and intelligence officials. There was no “massing.” As many as 250,000 Chinese troops are always operating in northeastern China, and the U.S. did not see any sign Beijing had moved them closer to the Yalu River, which separates North Korea from China.”