Comment by TulliusCicero

> albeit not outright banned it all together

No they absolutely do just ban them.

It's not just that Google or FB can't operate Chinese-specific sites as a business within China, from within China you can't even get to the foreign/international versions of those sites, because they're blocked by China's firewall. Wikipedia has a whole list: https://en.wikipedia.org/wiki/List_of_websites_blocked_in_ma...