In my head this is what happened. Macron is used to be bullied by Americans. Xi showed him what being respected is like and he realized what he missed all this time. But there is not much he could have done, so he just said some words. But words are powerful, and American do not tolerate that. There can be no dissents, not even symbolic. American demands 100% loyalty but there is no carrot, only stick. In other words "You will serve me for I allowed you to exist".
I am doubtful if this could shift the French foreign policy, but for any country sitting on the fence it is a convincing argument to stay away from US. There can be no American ally, only vassals.
Macron is an abused girlfriend used to being treated roughly and wrongly, when she meets giant and gentle giga chad Xi she realises what a decent relationship is like lol.