The end of a semester means another farewell and reunion. How I wish I could have a few more farewells and reunions before my college career ends! Sitting in such a clean dormitory, I felt a little uncomfortable. Everyone in the room was empty, and I looked around, feeling suddenly sad, a little scared, a little confused, and totally at a loss! I didn't know whether to walk out coolly and lock the door, or to continue sitting there. Sitting in this small room that filled me with joy, anger, sorrow, and joy, I was reluctant to leave. This is the only time in a semester that the dormitory is the quietest, so quiet that I want to cry. I suddenly wanted to write something to commemorate my four years in college, to commemorate the people I loved and hated, and to commemorate 225, which left a profound mark on my emotional history! The story I am going to tell you is a bit long, so long that I don't know where to start. In fact, the patterns are repeated every day, and some of them are trivial things, but they are so precious to me! This book is dedicated to my beloved eldest sister, Feifei, Yuanyuan, children, and Ayu!