The middle-aged uncle squinted his eyes, took out a notebook with a leather cover from the compartment of his backpack, opened it to the latest page along the bookmark, and wrote down two strings of numbers:
"X02305081536, X02305081505."
After that, he carefully placed the leather-bound notebook back into the compartment and left the classroom with his backpack.
...
May 8, 2023, 15:46.
Lin Yi and his two companions encountered Wei Shan on the cobblestone path leading to the Cafeteria area, exchanged greetings, and then walked together.
"Wei Shan," Lin Yi suddenly spoke as they walked.
"What is it?"
"Wei Shan, did you go to the restroom after 1 PM?"
Wei Shan paused slightly, then seemed to remember something and nodded: "I did."
"Oh..."
"What's up?"
"Nothing," Lin Yi shook his head.
A few minutes later, they entered the cafeteria area and came to a notice board.
