It's even shown on a BBC documentary, they get disappointed when DNA analysis disproves their skull-shape "evidence".
https://en.wikipedia.org/wiki/The_Incredible_Human_Journey#2...
With significant and predictable sadness when the results didn't go their (the CCP and Chinese nationalists) way.
A google search gives a good paper on the topic:
https://core.ac.uk/download/pdf/28941533.pdf
TLDR: CCP, seeking to shore up ethno-nationalism (not an especially rare occurance in Chinese history) spent a LOT of time and research trying to prove that Han Chinese are in fact originally descended from Homo erectus Pekinensis rather than the African Homo Sapiens. (EDIT: Spelling)
Go back 2.1 million years, like these stone tools, and it's not even clear that there is a genus Homo.