The content of the 20th note read: "The Teaching Building has a Block D, which seems to be not in this space."
The Teaching Building has a basement, but it is not yet known under what circumstances the stairway to the basement can appear.]
He erased "seems to be," then continued to modify:
"The Teaching Building has a basement—(crossed out)—, people who lose their Student ID cards after being contaminated (or is it a layer collapse or some other situation?) will see the stairway leading to the basement."
After editing all the previous 20 notes, Lin Yi glanced over them from start to finish, confirmed there were no issues, briefly organized his thoughts for the day, and then began to add some new notes:
"23, the Convenience Store is located on the ground floor of the Cafeteria in a place not illuminated by artificial light but which can be reached by sunlight, this location information might be related to some characteristics of its layer."
