Much like Marxist Historians in general, the history of the Chinese Dynasties have been impacted by both Chinese Marxist views as well as views prominent after the Cultural Revolution.
One of the first issues is that certain dynasties, such as the Yuan and other Steppe dynasties ruling in China at certain times, were incorporated into being "Chinese" when it was clear that they were not Chinese at all. The adoption of Buddhism and of Chinese bureaucratic culture was evident enough that some historians in China tended to brush them into being Chinese.
This, however, was not the case for the Qing since they were more "recent" and the opposition of personalities like Sun Yat-Sen to the dynasty forced certain Historians to be in complete opposition to them citing them as foreigners who were denying the Chinese their legitimate right to rule.
Secondly, the history of these dynasties also play a role in justifying territorial claims to regions where the current CCP government control. Hence why, from time to time, they will bring this or that dynasty out to use as for their justification to control places like Tibet, Inner Mongolia, and Eastern Turkestan. Ironically, they tend to also use the Qing dynasty to claim certain parts of different nations, such as Vietnam, to be Chinese although they will continually deny that the Qing dynasty was worth anything to the Chinese people.
Lastly, Marxist historians tend to view prior dynasties, of any geographic area, as being detrimental to that society and hence why much of the work written in the Soviet Union and in China tended to be similar, although not overly so due to different academic traditions. Hence why there will be occasional claim of social stratification and how the poor were being trodden by certain sectors of society and how awful it was. This doubly plays a role if historians produced during and after the cultural revolution are also looking at minority religions in China where they turn their attention to how the underclass were being abused by their priesthood.
Thus most often, again looking at Chinese historians, the dynasties of China are given a strict Sinization, then given a Marxist overview and finally used to justify certain aspects either the government wants or trying to portray the CCP in a certain light.
I do not know if this has gotten any better recently, but mostly from what I've read this tend has been continuing.
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