Walking into the site of Lukou Middle School, walking through the boys' building, girls' building, office building, teaching building... This series of familiar school places names, deeply stimulated me. School, what a wonderful place, but disaster happened here. In addition to standing still and silent, my mind is full of students lively and lovely, their laughter, their class thinking, class or joke or health... Facing these places, I stand still, silent, blank in my mind... What a lovely life, what a ruthless disaster...