Looking at the young faces in the photo, the faces that are about to be blurred in memory are clear again. It turns out that after so many years, we are all old. Recalling those lush years, I can't help feeling deeply. After so many years, some old friends are gone, youth is gone, and time cannot go back. My eyes hurt, and the memories of the past come back to me again and again. When can I see them again? Alas.