They do talk about class struggle, it's part of the high school curriculum for the course “思想政治”, ideology and politics course. Also, you can look at the three represents, which tackles the class question.
There is a point where class struggle has to take the back seat in a socialist controlled country for you to properly levy your productive forces and create cohesion. Constantly fighting the forces within when bourgeois forces don't hold political power is self-defeating.