Yes it all depends on how effective the #CCP is in taking down relays. I think in reality most censoring works through people selfcensoring. Probably the CCP only has to make examples of some relay owner that are putten to prison, when they host critical information.
As I have read, all form of encryption needs to be state approved in china. So it could be even illegal to distribute software, that offers unapproved cryptography. So probably relay and server owner have no legal form to excuse themself by not knowing what content is on their hardware.
And I would assume, that eighter through partial access or mass tracking the police in china has access to all commercially sold devices running commercial software. When it is possible to install opensource operatingsystems, it could be possible to have some intellectual property digitally.
I am really thinking since a longer time, to put a stand on the street to educate about sound encryption and software to use. And ask chinese tourists, if they are willing to learn something about digital sovereignity. Could be intresting to see, if some chinese people are willing to participate.