We've discussed this countless times already.
European elites are deeply in bed with American interests. Their power, their wealth, their prestige are all dependent on the US financial & geopolitical status quo; and on top of it, the CIA likely knows the skeletons in their closets and can black mail them.
They will never defect to China, because China cannot and will not offer them the same things. It goes beyond simple "white supremacy" (though that is certainly a factor). Racial loyalty alone cannot explain the degree to which European elites are willing to bend over to the US - after all, the US isn't doing the same for them. But what can explain it is a system of vassalage, by which European elites derive their legitimacy and status from US patronage in a fundamental way.
There are analogies to Chinese history. The Western Zhou Dynasty especially, where the power of the various regional lords derived from the Zhou King and his investiture. And of course, it has analogies to European history, where the decentralized feudal system lasted a lot longer, arguably to the modern day.
For European elites, losing US patronage is tantamount to being kicked out of the Western ruling caste and becoming a pariah - a status no European elite can afford because it is the equivalent of political and financial suicide. Chinese investiture can never replace it, in the same way that a Chinese lord could derive no legitimacy by pledging to the Xiongnu - quite the contrary, he'd be ostracized and soon deposed. The only way pledging to the Xiongnu would ever work is if the Xiongnu actually went and established a legitimate dynasty in China. Just the same, European leaders would only be willing to swap the US for China if China took over the US global empire with all its institutions and systems, which is probably never going to happen.