As always, the US has a government removing red tape to foster innovation, while China has a regime, unfairly picking winners, to hurt and subvert the West.
If china anointed one company per sector, they would have no reason to be so cost competitive globally. There would be no structural cause for Chinese products to outcompete the rest of the world. You can see some of this in the US, where these kinds of anointed companies exist (say e.g. Boeing/other defense contractors, at least post the 90's). They are (famously) not particularly cost competitive. This is also exactly what you'd expect economically.
Their Barbarous Wastes