Lord of the Spirit Flags

Zhang Huaichang, a doctor of physics, was reborn when he was four years old. Because he was braver than before, he saw his father for the last time, recovered his lost soul, and was able to inherit the family's spiritual summoning technique. From then on, he was called "Sir". "Teacher, I want to leave school early this afternoon, is that okay?" "Huaichang, although you have perfect scores every year, the knowledge after fourth grade..." "Your eldest uncle has returned to Xinzhai, Shen Shi..." "Sir, after your first class in the afternoon, I will take you off on a motorcycle."