And frankly you don't need to delve into any kind of theory or economics to see that this argument that China is actually a capitalist state pretending to be socialist is prima facie nonsense. That's just not what the bourgeoisie do when they manage to overthrow a socialist state.
They have nothing to gain from continuing to pretend like they are Marxist-Leninists. When socialism falls it is unmistakeable, it looks like what happened in the former Soviet Union, it looks like genocide by economic collapse.
They gain much more benefits from declaring outright that they are in power than from such an elaborate decades long charade in a world where capitalism is still dominant. If nothing else they would gain good relations with other bourgeois states which can help them stay in power and enrich themselves even more as comprador elites.
So this is just nothing more than a childish conspiracy theory, to believe that if socialism was actually defeated the new ruling class would keep up the pretense that it has not, maintaining the inevitable animosity with the imperialist world that such a status brings with it.
It is absurd even to imagine it. Do you know of any capitalists who would sit through and even mandate hours and hours of classes in the study of socialist theory for themselves and their fellow ruling class elites?