The notice of finding things is related to a person's lifelong destiny and sense of urgency.

I think if you really can't find it, you can ask your seniors for a political history book. Besides, he is now in the second day of junior high school, and he is not going to take the senior high school entrance examination immediately. The notes in it can be copied over the notes of the teacher or classmates, which will deepen his memory. Don't worry too much. Don't worry about getting it back. If you can't get it back, you have to think of a remedy.