China has not achieved a global, publicly owned and planned economy, no, but is still working towards that, as Marxists would, through Socialism.

First of all, the state and government are not the same thing, and parties are not classes either. The State is the aspect of society that enforces class distinctions, classes themselves being relations to ownership. The way Marx believed we could get to statelessness is by nationalizing the large industries and firms that are already built up enough for central planning to work, and let the small firms compete and grow until they reach that point. This is what China’s economy looks like.

I think if you listened more to what Marxists believe, you’d be more likely to succeed in leftist organizing in real life (if you do any).