In my opinion, I think the problem elevator building 15 should be improve because , each day the students study in building 15 is mostly. Sometimes the elevator does not work, have trouble and slow make a student is born the anxiety. Now, News about the accident elevator happen very often, which most of the people died, I want the university attends about the elevator too much go up , such as, may adjust fast go up , safety or may change elevator new , for the comfort of student in time uses the elevator, before have an accident with a student or the user elevator.