This book is one of the famous sci-fi writer Yang Peng”s masterpieces Three Musketeers on Campus. It tells the story of the young Yang Ge accidentally discovering that the handsome teacher Ating is an alien spy. It turned out that there was a nuclear war on the planet Ankara on the other side of the galaxy not long ago and the forest was destroyed. In order to save the planet Allah, Teacher Ating, as one of the "earth expeditionary forces", was sent to the earth to collect plant seeds. So, under the leadership of the alien teacher Ating, the students of Sunshine Middle School spent a wonderful night of the Milky Way Railway