This isn't new or anything, but every time I read about it, I find myself really angry. The behavior of the Chinese communist party is shockingly, disgustingly immoral.
Blocking information because it might undermine the grip your ideological brainwashing has on a population. It really is a sort of fundamental evil, a primary stain on the history of the human species.
I have some anecdotal stories from friends in China. It's actually quite a bit worse for the average academic than we think. The pressure to include communist party propaganda in one's research is incredibly strong – and in some cases mandatory (e.g. if you want funding).