Wei Collection, Lower Volume Radical: Feather (yǔ) 翠 Kangxi Strokes: 14 Page 957, Entry 36 Broad Rhymes (Guangyun), Collected Rhymes (Jiyun), Rhyme Meetings (Yunhui), Correct Rhymes (Zhengyun): Pronounced cui (falling tone). Explanation of Graphs (Shuowen): A green-feathered sparrow. It comes from Yulin. Approximation of Near Synonyms (Erya), Explanation of Birds: The cui-yu bird. Commentary: It resembles a swallow and is deep blue in color. Sub-commentary: Li Xun states that the yu is also known as cui; its feathers can be used for ornamentation. Fan Guang says: Green feathers. They come from Jiaozhou. History of the Former Han (Qian Han Shu), Biography of Jia Shan: Decorated with feicui (kingfisher feathers). Commentary: The male is called fei, the female is called cui. Also in the Biography of Zhao Tuo, King of Nanyue: Dried cui birds. Treatise on the Investigation of Things (Bowuzhi): The fei bird is generally black, with red feathers only on the chest, back, and behind the wings. The cui bird is generally blue-yellow, with six long primary feathers an inch long. When it flies, the wings make a sound like cui-fei, cui-fei, and it is named for this. Also in the Book of Rites (Liji), Inner Chapters: Boiled goose and cui. Commentary: The shu-yan is a goose. Cui refers to the meat of the tail. Also in the Approximation of Near Synonyms (Erya), Explanation of Mountains: Before reaching the upper cui-wei. Sub-commentary: This refers to the area on the side of the slope before reaching the summit, called cui-wei. Another theory states it refers to the blue-mist color of the mountain air, hence the name cui-wei. Also a surname. Commentary to the Emergency Primer (Jijupian): The Cui clan is descended from the Jingcui of Chu. When they fled into the pass and relocated three times, harboring attachment to their homeland and hiding, they changed their surname to Cui. Textual Research: Also a surname. Commentary to the Emergency Primer (Jijupian): The Cui clan is descended from the Chen of Chu. According to the original text, the Chen of Chu has been corrected to Jingcui of Chu.