I remember that my eldest brother taught me to write essays (a style that can be roughly understood as argumentative essays now). As long as the contents in the essays exposed the old background of "good people", he drew a circle (a way of taking notes, expressing approval and attention, and idioms were remarkable); And if he forgives the "bad guy", he will sarcastically say, "Do something new and wash the floor for others, young man, you are very thoughtful." I can't fathom their thoughts.