Also, top student had solved problems with high school mathematics knowledge when we were in grade one.
I remember that the monthly exam in junior high school is based on ranking. I was only a teenager then. Top student always sits in the first seat near the door. I still remember the picture that moved me: he always finished the questions early, leisurely took out his cup to drink water and looked out the door. The sun shines on his face, which is really charming.