Forgive me if this is a confused question, I’m still learning my dialectics, but how does China’s concept of democratic centrism and its insistence that the CCP be the sole governing body mesh with this understanding of contradictions and their resolution? Is the existence of absolute power itself not a restriction that prevents (or could very well prevent) the movement and change that would otherwise happen to resolve the contradictions you mention? Like, fundamentally I just don’t see how dialectical materialism is consistent with unchallenged and unjustified power.