What is the main content of Yu's southern cicada?

The cicada described by the poet is a personalized cicada. Three or four sentences: people with noble moral character can be famous far and near without external help. Every sentence describes the shape, habit and sound of cicada, and every sentence implies the poet's noble character and interest. The deep meaning of chanting things is to praise people.

The translation of the whole poem is as follows:

Cicada hangs down its tentacles like a hat tassel and sucks the sweet dew. The sound comes from the tall branches of the phoenix tree.

Cicadas spread far because they live in tall trees, not by autumn wind.

The author introduces:

Yu Shinan, whose real name is Bo Shi, is from Yuyao (Zhenming Hechang, Guanhaiwei, Cixi City). Famous calligrapher, writer and politician in the early Tang Dynasty. Emperor Taizong called his virtue, loyalty, erudition, style of writing and writing the five wonders ("Shinan is a talented person, so there are also five wonders." One is loyalty, the other is friendship, the third is blogging, the fourth is rhetoric, and the fifth is writing. "The original collection of poems and essays has a total of 30 volumes, but it has long been lost.