He Laoshi is the founder of the course "Children's Mathematical Thinking Training", and the only expert in children's mathematical education who is still teaching in China. He has both the theory of children's mathematical thinking education and rich teaching practice experience. This book is the most complete, systematic and scientific series of children's mathematical thinking training and development in China, which brings together the achievements of the author's teaching practice and theoretical research on children's mathematical thinking training for more than 30 years and 10 years. After more than ten years' teaching practice, He Laoshi's "Children's Mathematical Thinking Training" course has achieved fruitful results in the famous experimental kindergarten of Beijing Normal University.