What content of calligraphy is suitable for counselor's teacher's office?

Since the other person is a teacher, of course, you should write something with cultural flavor, such as some classic poems and essays. But pay attention to the style of words. If the other person is a calligraphy student, the style is not limited, but if the other person doesn't know calligraphy very well, pay attention to the font that is not too difficult to understand, such as crazy grass, which is not suitable. ...