Despite full Maoist Communism in China, descendants of former landlords and rich peasants today earn 16% more than descendants of others.

They couldn't inherit wealth from grandparents, parents were barred from university in Cultural Revolution, but they inherited something

Source
Free version: http://www.bristol.ac.uk/efm/media/workingpapers/working_papers/pdffiles/dp20722.pdf pdf

Hereditarians say family wealth is due in part to genetics. Blank slatists say it's due to direct transmission of education or wealth. This Chinese wealth and education shock supports the former. Other examples: https://twitter.com/whyvert/status/1117492722187763713

One more example: "the Flight of the Wild Geese" https://twitter.com/whyvert/status/1028654284286636032

Another study:
In 1950, the new Communist regime assigned every family to an hereditary class category in order to penalize some and reward others.

How successful were the descendants of these families half a century, three generations later?

Those of the Bad Class were penalized by e.g. not being allowed into university, not able to join the Party, not have cadre jobs. Bad Class individuals were sent down to the countryside at much higher rates than all others in the Cultural Revolution.