Are Donnie yen, jet li and jackie chan real fighters?
Yes, they have studied martial arts. In the movies, everything is VERY carefully choreographed. On the streets, if they got into fights, I'm quite sure they would fight well, though somewhat differently, and the fights would be much shorter.
If you mean, Can they fight? then yes they all can really fight. If you mean, Do they fight for competition? then no. they don't