The fundememtal difference between China and US, or rather between China and the entire western world, is China has more than a millenia of mertiocratic tradition, while the weste has the same amount of theocratic fedual tradition.
Modern political systems are really just wrapper on cultural traditions, Chinese tradition always believed in postpriori knowledge, that is result based determination of a person's value, while western tradition always believed in a priori knowledge, that is a person's value derives through birth or promises.
US cant actually replicate China's model, because for state involvememt to be successful, officials of the state must be competent, and western culture inherently do not believe competency is required for power, never did and never will.
At end of the day not all civilizations are equal, over the last few centuries the west benifited from their religion fueled psycopathic need for conqust in a world where others did not, but now that they lost their abilility to steal, not that they're not still trying, they fundementally lack the civilizational attribute to compete with superior civilizations.