While currently there is no evidence of direct Chinese state interference with the Bitcoin network, this could become a credible attack vector in the future.
I believe its economic value its still too low to be of real concern, becoming more so as it grows (and likewise the same for other state actors).
There will the serious possibility of covert tampering using state-own-enteprises to control miners while disrupt non-chinese miners, using the GFW for technical interference, and undermining consensus by destabilization.
There was an excellent paper on this topic published by Ben Kaiser, Mireya Jurado & Alex Ledger (circa 2018):
The Looming Threat of China: An Analysis of Chinese Influence on Bitcoin
https://[Suspicious link removed]/2Yvlg74
Check it out if your keen
