Yu Gong
The most prevalent account of the Nine Provinces comes from the "Yu Gong" or "Tribute of Yu" section of the "Book of Xia" (夏書), collected in the "Book of Documents". It was therein recorded that Yu the Great divided the world into the nine provinces of Ji (冀), Yan (兗), Qing (青), Xu (徐), Yang (揚), Jing (荊), Yu (豫), Liang (梁) and Yong (雍). The geography section (釋地) of the ancient "Erya" encyclopedia also cites nine provinces, but with You and Ying (營) listed instead of Qing and Liang. In the "Clan Responsibilities" (職方氏) section of "Rituals of Zhou", the provinces include You and Bing but not Xu and Liang. The "Lüshi Chunqiu" "Initial Survey" (有始覽) section mentions You but not Liang.