Qing Ran, a girl in the first grade of high school, was on her way back to the orphanage while picking up books at the beginning of school. Unfortunately, she traveled through time, and then... Saved the world in another world with her bag of books (the girl in the second grade of high school and her reliable friends saved the world)
In a fantasy world, science is also needed
This article is imitated from "The Master is Offline Again" written by You Qian.
Purpose: To make others happy to watch