Wei Collection, Middle Volume. Radical: Feather (yǔ). Kangxi Strokes: 11. Page 956, Entry 11. Pronounced yi. Pronounced yi. The following day. Annals of Emperor Wu in the History of the Former Han Dynasty (Qian Hanshu): The following day, he personally ascended Mount Song. Commentary: Ying Shao says, yi means bright or clear. Also pronounced yu. In the Book of Documents (Shujing), the phrase the following day, yi chou. Liu Changzong read it thus. Note: The modern text of the Book of Documents uses the character meaning wing instead. Yi is the same character as yi (to assist), and yi (to assist) is also the same as yi (wing).