China did well after adopting a capitalist economic model. Not so well after adopting a communist economic model. Over 50 million dying just from starvation is basically the worst you can possibly be. Insane top down command like killing all the sparrows or collectivizing farms, or pulling nails out of furniture so that little villages can make steel describes the insanity of that approach. It had a shelf life of about 40 years.

They still maintain the party dictatorship.

Really what matters for dominance is a disciplined party apparatus that seizes power in some kind of coup or revolution and then rules the country with an iron fist.

The party may use a justification of envy -- appealing to people's anger that others have more than they do -- or it may use religion, or moral arguments, or national pride arguments. But those are all instrumental to the underlying aim of power.

Once you are in power, you can impose capitalism or communism or some mix. If communism doesn't work, you can discard it and look for something better.

It's interesting that many on the left just dropped working class issues like a used shirt and refocused on race with extreme ease. For me personally, that's how I distinguish between a group that wants power as opposed to a group that is advocating for some policy profile. If they can switch out the policy profile and replace it with something different, then they were never that interested in policy to begin with.