Lüshi Chunqiu
Traditionally, the "Book of Documents" is thought to depict the divisions during the Xia dynasty, the "Erya" those of the Shang dynasty; the "Rituals of Zhou" the Zhou dynasty and the "Lüshi Chunqiu" the concept and actual territorial distribution of the Nine Provinces during the Spring and Autumn and Warring States periods. The "Lüshi Chunqiu" contains the following passage on the location of the nine provinces and their general correspondence with the states of the time: