Alongside nationalism and various other eventually violent political ideas the Chinese elite imported from Europe from mid 1800s onwards were racism and racial supremacism. These were floating around when the republic was founded and later Mao was apparently a subscriber too. Several of his deadly policies had a tinge of eugenistics about them and IIRC he also wanted his scientists to prove that the Han were a single unified "race", although DNA analysis would later reveal distinct northern and southern populations (with northern male DNA increasing in the south due to repeated invasions and their obvious repercussions).
I wouldn't be surprised if Xi Dada subscribed to the earlier nationalists' racial ideology and this is what we might now see in the PRC's propaganda media.
The worry for me is that the great Chinese masses are criminally ignorant of actual world history, including the racial theories and crimes of the Nazis. Even in some corners of the West the lessons have been forgotten and new racist fires are being stoked (often by foreign bots), but at least in the West there's civil society and free media to counter the rise of race-based hate ideologies. In the PRC the growing focus on "race" - and all media material with political effect is disseminated because the Party has so decided - can have very different consequences.