Anna Jia Lazari, a world-famous Italian math teacher, has been teaching in Turin for a long time and has rich teaching experience. She has been thinking about how to make children fall in love with mathematics, and has published many introductory books on mathematics that are deeply loved by readers. After its publication, this book not only won the recognition of mathematicians, but also won the favor of the majority of primary and secondary school students, and was listed as the designated reading of the mathematics popularization plan by the famous Italian university Turin.