This book is a folk poem widely circulated among the Hani people. It is sung in the form of Hani (traditional song) and passed down from generation to generation. Nuju is Hani language, which is equivalent to pian and zhang in Han writings or repertoires in Han folk art. Twelve slave bureaus means twelve road songs. The translation shows the unique imagination of the Hani ancestors in ancient times, involving Hani peoples knowledge of celestial bodies and nature, human development, Hani history, calendar calculation, four seasons, agricultural activities, etc., and completely reflects the Hani ancestors understanding of heaven and earth. The understanding of formation, human origin, and national migration has the nature of a collection of creation myths and heroic epics, and can be said to be one of the most important literary classics of the Hani people.