There is nothing in what China is doing that is inconsistent with Karl Marx. Capitalism is a necessary phase in the historical development of a country. At some point, the Chinese Communist Party will decide that capitalism has served its historical purpose and nationalize all the industry that the capitalists have created. Then will come socialism.
It was Lenin who believed that a country could “leap” directly from feudalism to socialism. Marx never said that.
Except if you watch them you can easily tell that they are not Marxian ideologues. The leadership in China is motivated by the accumulation of power and wealth, not by bringing about some Marxist utopia.
China’s regime dabbled with Communism for a few decades, now they are returning to their old Confucian/Imperialist ways. They are still our enemies because they disdain liberty, Communism is not alone on that subject.