Rengui

This book deeply explores the principles of Ren Mathematics, based on Yili, and expounds the relationship between images and categories, numbers and principles through the study of the heavenly stems and earthly branches. Some of the ideas in the book are very interesting, such as "images are born from numbers" and "kinds are born from images", which gave me a deeper understanding of the nature of things. However, some parts are still relatively obscure and require careful consideration. Overall, it's a good book worth reading.