This book contains many short and medium-sized fairy tales, sketches and science fiction stories about mathematics written by Li Yupei, a famous popular science writer and professor of mathematics department of Capital Normal University. In these works with rich content, strange ideas and exquisite writing, they not only explained the mystery of mathematics to you in popular language, but also cultivated readers' interest in mathematics.

The face of mathematics is both rigorous and magical. Its golden section has created countless beautiful buildings, and its infinite acyclic decimal has created a fantastic pyramid ... mathematical beauty is everywhere. The battle between rational numbers and irrational numbers includes mathematical fairy tales, mathematical detective stories and mathematical adventure stories, which are suitable for children readers to read.