"The phoenix tail is dense, and the dragon tail is thin." It appears in Chapter 26 of the book "Spring Sleepiness in Xiaoxiang Pavilion". When Baoyu is bored, he strolls to Xiaoxiang Pavilion. In front of the courtyard, the author described the scenery and atmosphere outside Xiaoxiang Pavilion with the words "dense phoenix tail and thin dragon tail".

The etymology of "phoenix tail is dense and dragon is fine", except the origin of "phoenix tail" and "dragon", this combination word is the original creation of the author of A Dream of Red Mansions, and the rest of the words are not recorded. The "phoenix tail" here naturally refers to bamboo, which is called "phoenix tail bamboo" and can also be extended to bamboo. The solution of "Long Yin" is more complicated, and there is a solution of "Roaring Tigers and Long Yin". It seems irrelevant to interpret Xiaoxiang Pavilion as a place where tigers roar and dragons sing. It is meaningless to have a solution of "the sound of flute and wind instrument"; It is even more outrageous to interpret it as "the order of the monarch"; It seems that it can only be interpreted as "the sound line is deep or subdivided", which shows that Feng Ke and Long Yin are put together for the need of word formation and have no practical significance.

First, the words "the phoenix tail is dense, the dragon tail is thin", "a wisp of fragrance secretly emerges from the screen window" and "a sigh" lead to the fairy sound of "sleepy at home every day"

"Sleeping at home every day" is a lyric in the West Chamber, and "home" is a modal particle, which has no practical significance. This sentence describes Yingying's boring mood of missing Zhang Sheng, and Baoyu happened to come when Daiyu sang this poem, punning.