The 17-year-old pen is a magic wand.
I always secretly turn the penholder during evening self-study, watching the swaying stars in the ink bottle reflected on the classroom window, with dark blue ripples spreading over the backs of the rows of people sitting at their desks, and the ponytails of my classmates hanging down.
The notebook at that time was like a moving castle, and I put the whole world on the tip of my pen...
Purpose: Put the whole world at the tip of the pen