Some media that I have read called Eileen Gu a traitor and she benefited it all from US training and then jumped ship to represent China.
The great youtube algorithm recommended me this video tonight. It shows these 2 kids, Eileen Gu and Su YiMing(a fellow snowboarder who won gold and silver as well at the Olympics) training and goofing off together at an age of early teenageers. Seems to me that Eileen have been training both in the US and in China for a while and had already struck quite a friendship with future Chinese skiers a long time before she hit the radar.
Another case of the media jumping into conclusion(prematurely accusing her of jumping ship for money and having gotten exclusively US training) ?