Because most people are (or should be) aware of what happened at Tianamen Square in 1989, it is hardly news these days. The story is about a banning what appear

Because most people are (or should be) aware of what happened at Tianamen Square in 1989, it is hardly news these days. The story is about a banning what appeared to be covert references to that incident, hence the "news story" is about ongoing Chinese censorship. Why does this even need explaining?