Yin Collection, Middle Volume Radical: Mountain (shān) Tu Kangxi Strokes: 10 Page 312, Entry 07 Guangyun (Broad Rhymes), Jiyun (Collected Rhymes), Yunhui (Collection of Rhymes), and Zhengyun (Correct Rhymes) all provide the pronunciation as tu. Shuowen Jiezi (Explaining Graphs and Analyzing Characters) defines this as Kuaiji Mountain. Another interpretation refers to Dangtu Mountain in Jiujiang Prefecture. In the original version of the Book of Documents (Shangshu), it was written as tu, composed of the mountain component and the phonophore yu. It is sometimes written in a simplified variant form (tu). In current literature, the character tu is often borrowed to represent it. Book of Documents (Shangshu), Yiji chapter records: Yu married a woman from Tu Mountain. Ying Shao comments: This refers to a woman from the Tu Mountain clan of the Marquis of Tu Mountain whom Yu married. Zuo Tradition (Zuo Zhuan), Seventh Year of Duke Ai records: Yu gathered the feudal lords at Tu Mountain. Du Yu comments: This location should be in the vicinity of Chao County within the borders of present-day Shouchun, which is the Dangtu County recorded in the Book of Han (Hanshu), Treatise on Geography. Zhengzitong (Correction of Characters) points out: The interpretation in the Shuowen Jiezi that restricts the character tu solely to Kuaiji Mountain is an error in textual research. For a detailed analysis, please also refer to the entry for the character tu under the Earth radical.