"why should we know about Rome and Greece.Ancient China was more advanced than anything other country." because they had f'ing usable public bathrooms. 

as to the movie, movies are meant to tell about how awesome China is, so this movie is pointless

The  CCP media oversight people only allow a limited number of foreign films to enter the Chinese market each year.   Many studios lobby for those few slots.  It could be that the studio in America just didn't submit this particular movie to the Chinese market.  It's not always all China's fault that things don't work out the way we like.

@xinyuren is right. Only something like 34 foreign movies are allowed to be shown, and that is almost always going to be superhero movies that will make a bazzilion dollars. The 300 sequal wasnt expcted to be very big or due that well. I doubt they even tried to bring it here. Especially as its a sequal and if I remember correctly the first one wasnt shown here either.  Which is a shame as the movie was freaking cool, although Im not sure if you can call 300 anywhere close to an historical film. 

Other than what Xin said, why have 300 shown here, when it's basically the same as most ofher Chinese non-modern movies they make here? (admittedly, with better blood effects )