May 10, Year X023, 5:46, Teaching Building B, Teachers' Office, "Group B Class 2."
Through the slightly open door, clear yellow light illuminated Lin Yi's surprised expression.
In Lin Yi's hands was a book that looked like a modern Chinese dictionary, but when he opened it, he discovered that it had been hollowed out and something else placed inside.
He took it out and found a folded document inside a document envelope. There was no sign that the envelope had ever been sealed, so he could not tell whether anyone had read it, but Lin Yi knew Head Teacher 040 had definitely opened it.
His only concern now was whether Head Teacher 040 had replaced its contents.
He opened the envelope and looked inside. It contained a very neatly arranged stack of note paper and a folded sheet of very thick, poster-like paper.
He carefully took these materials out of the envelope. On the topmost note, elegant handwriting clearly read:
"The 71st Gray Fog Invasion was declared over today. Some questionable points emerged during this incident, forcing me to reexamine certain details of the previous Gray Fog Invasion..."
"I will reopen my investigation into the 70th Gray Fog Invasion (November 20, X022-November 24, X022) and record my progress as it happens..."
"If anything happens to me, it means my investigation was heading in the right direction... I will record my findings here. I very much hope someone can continue investigating, but I will also respect your decision."
"Anyone who sees the following information may choose to continue investigating or to ignore it..."
"-'Head Teacher-B2-039'"
"X023.1.31"
Lin Yi froze briefly, puzzled.
He had thought Head Teacher 039 would leave him a copy of the Teacher Rules, along with a message like, "Child, the time has come for you to transform." But