Cicada's voice can travel far because of its height, not by the strength of autumn wind.
Analysis: This sentence is the crowning touch of the whole article. It is a discussion of poetry on the basis of the last two sentences. Cicadas spread in all directions. Most people often think that it is the autumn wind, but poets have different understandings, emphasizing that this is because of "high".
This unique feeling contains a truth: people with noble character do not need some external support (such as power and status, the help of powerful people) to be famous far and near.
Appreciate this poem full of symbolism. 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 key of this poem is to grasp some specific features of cicadas and find artistic correspondence from them.