Chen Collection, Middle Volume Radical: Tree (mù) Kangxi strokes: 12 Page 534, Entry 05 Pronounced yu. According to the Explaining Graphs and Analyzing Characters (Shuowen Jiezi), it is the white rui shrub. According to the Erya, a dictionary of definitions (Erya), it is the white rui shrub. Guo commentary states: It is a small, clustered shrub with thorns; its fruit resembles ear ornaments, is purplish-red, and is edible. According to the Book of Odes (Shijing): The oak and the white rui shrub are pulled up. Zheng commentary states: The oak is the qing oak tree. The white rui shrub is the tree described. Lu commentary cites Wang Cang who says: The tree is the same as the oak. Kong Yingda states: The two explanations differ, and it is unclear which is correct. Also, Yuyang is the name of a Han dynasty palace. According to the History of the Former Han (Qianhan Shu): Clouds and vapors, blue and yellow in color, appeared like gathered birds to the south of Yuyang Palace. Also, pronounced yu. The meaning is the same.