The Chinese also recently claimed discovery of a mega gold deposit, so the timing seems suspect. In El Salvador's instance, the metal combinations also seem off. Gold is most generally associated with copper and/or silver mineralization - they all being in the same group in the periodic table. Weird ore combinations aren't unheard of, but definitely are less common.
All the Chinese gold headlines I've seen looked like click bait - this one (foxnews.com) included. I'd assume their "news" is more akin to propaganda in order to manipulate commodity prices.