? Extraction code: j 1ie

"hello! "Mathematics" is a series of large-scale picture books of mathematical concept enlightenment carefully created by experts organized by Gitan Research Institute, an authoritative preschool product research and development institution in Korea, and a team of first-class children illustrators. Since its publication, the book has been a five-star recommended product of the three major book sales networks in Korea, and won the highest achievement award of Korean books-the Education Management Award of the Ministry of Culture and Tourism. This series has also been designated as the key promotion variety of "One Book a Day, Expo 3000" children's reading plan, becoming the best-selling picture book for early childhood education in Korea and a must-read series for parents and children! Walk into the magical world of mathematical fairy tales with your children!