Postgraduate Entrance Exam Boarding Class: Don't Endorse the Book Aloud After Lights Out

After failing the postgraduate entrance examination in World War II, I gritted my teeth and signed up for a low-cost boarding class in the suburbs, hoping to move in with my bags at a cheap price. On the night of check-in, the dormitory warden handed over a crumpled handwritten class rule with a red pen circled around it: After lights out, no endorsement is allowed.