I am Chinese,actually I can still access the Forum through the phone network(CUCC) ,but the forum isn't available on the PC as the PC is connected to Internet with the CTCC network.This is my situation.
We could not say the GFW has banned the forum because we can get access to the forum in some way even it's unstable. But we believe the day that they ban the forum fully might come someday.
Doesn't make sense to ban internet but not phone network.
There are also some crypto forums hosted in China, are they being affected?
No, these forums won't be affected , you know ,hosting in China means the server is in China, in other words, they control everything, if there is something they don't like they will ask the site to delete it or they will take the server down directly.