phonetic notation of "cicada":
chuí ruí yǐn qīng lù, Li ú xi ǐ ng ch ū sh ū tó ng.
when you hang down, you can drink clear dew, and the sound will make you sparse.
jūgāo shēng zì yuǎn，fēi shì jiè qiūfēng。
it's not the autumn wind that keeps you aloof.
Cicada:
Cicada hangs down its tentacles like a hat tassel and sucks the clear and sweet dew, and the sound comes from the tall and straight branches of the phoenix tree.
cicadas spread far away because they live in tall trees, not by autumn wind.
In the first sentence, "hang down and drink clear dew", "hang down" is the drooping part of the hat band tied under the chin of the ancients. The cicada's head has protruding tentacles shaped like a drooping crown tassel, so it is called "hang down". The ancients thought that cicadas were noble in nature and lived high and drank dew, so they said "drink clear dew". On the surface, this sentence is about the shape and feeding habits of cicadas, but in fact it contains metaphor everywhere.
"Dang Yi" implies the official status (in ancient times, "Guan Ying" was often used to refer to your official). In the eyes of ordinary people, the status of this dignitary is contradictory or even incompatible with "Qing", but in the author's pen, they are unified in the image of "hanging down and drinking clear dew" This unity of "expensive" and "clear" is precisely because the "clear" in the three or four sentences does not need to be countered by "expensive", and the brushwork is quite clever.
The second sentence, "Flowing makes a sparse tree", describes the distant spread of cicadas. Platanus acerifolia is a tall tree, with the word "sparse", and its branches are tall and clear, which corresponds to the last sentence "autumn wind" The "flowing" cicada's long sound is pleasing to the ear, and the word "Chu" is used to visualize the meaning conveyed by cicada's sound, as if making people feel the loudness and strength of cicada's sound.
Although this sentence is only written in sound, the reader can imagine the personalized cicada, which is Tsinghua's high-standard charm. With this vivid description of the distant spread of cicadas, the play of three or four sentences has a root.