When I was living in China in 2009, my apartment came with wifi. I noticed I would get shut down often, and made a game of it based on what content I typed in chats to friends back home. But it got old quickly, and then I went to the router in my apartment to reset it and install some custom firmware when I realized the wifi pw they gave me wasn't to the router or modem in my apartment. I factory reset it and had much better access and was able to easily circumvent the great wall after that. Foreigner internet certainly exists, but in my experience it was much more limiting.

I was there in 2023.

You're describing exactly the opposite of what I found to be the facts on the ground. My connection to a residential address in the United States was allowed for a couple of days at a hostel, then blocked. It was never allowed over (Chinese) mobile data.

But it was completely fine over the internet service to my apartment. The home internet service and the mobile service were provided by the same company in a bundled plan. I was always curious what they were doing.