This is a gift to myself in college. Maybe many years later I won't remember the knowledge I learned in college, but I will definitely remember the principles of life I learned in college. I am grateful for what I have experienced in college, the people I have met and the things I have encountered. Maybe it is really difficult in the trough, no one cares about me, no one cares, but I am grateful for the troughs I have gone through, and I am also grateful to those who accompanied me during the trough. These are some of my own reflections on my university, written down as a souvenir.