I went to China around 2012:
* Facebook was already blocked
* Google and wikipedia magically stopped working when you searched for "tiananmen"
* Gmail worked fine
I returned in early 2017, oh god what a change:
* Don't even think about Facebook
* Ironically Facebook messenger worked until my session expired
* No gmail, google at all (don't remember about Wikipedia)
* Whatsapp worked fine
And now it is even getting worse....