Communism

China has billionaires because it has private property, and it has private property because the CPC decided to integrate with the global market for the purposes of more rapid development and technology transfer. Every ML that exists has had to consider why China still has a bourgeoisie, the idea that we simply ignore it is absurd. Secondly, Marxism-Leninism does have a strong environmental component, you need a healthy environment in order to have a lasting environment for humanity. If we do not take care of the planet, then we will be wiped out.

As has been linked in this thread before, China Has Billionaires is an excellent starting place for understanding China's socialist system and its contradictions, contradictions that propel it to move forward and change.