Hollywood movie is popular around the world. When the Hollywood movies are showing on the screen, a lot of parents bring their children to enjoy the movies. In America, movies have been rated, which means teenagers can't see all the movies. The movies with too much violence or naked scenes are limited to the children under 18. While in China, children can see any movie they want, because the rating system doesn't exist. I remembered once I watched a horror movie. Many parents brought the kids and they were really scared. It was not suitable to bring the little kids to see such violent scenes. Some would dream the bad scene and be scared of something all the life. A lot of people called for the rating system and it could protect the children.