How to understand the expression of the poem Jia Xu?

There are three ways to express The Book of Songs: Fu, Bi and Xing. The so-called "Fu" means foreshadowing, which is a direct narrative without false comparison; The so-called "comparison" is metaphor and analogy. Using this thing to compare with another thing makes the characteristics of things more distinct and prominent, and makes readers get a deeper impression; The so-called "xing" means excitement. The poet used something else to trigger the following words.

The words "Cang Cang", "Yu Long" and "Cai Cai" are used in the poem not only to cheer up and cherish the memory of "Yi people", but also to set off the lyric hero. For "Iraqis", the poet knows his position, but he doesn't decide where to go, so he wants to go back.

The poet's sense of emptiness and disappointment caused by the pursuit of Iraqis is indescribable, and it is more prominent and rich against the bleak and clear autumn scene. It is precisely the scenery that gives birth to feelings, and the scenery comes together. The ethereal late autumn scene and the confused thoughts are integrated, which constitutes the artistic realm of the whole poem and gives people a true, natural and hazy aesthetic feeling.

Besides, this poem is repetitive in structure. The whole poem consists of three chapters, with the same sentence pattern and the same number of words, except that synonyms or synonyms are selected in a few places, such as "growth" and "mining" are placed in the gray position respectively, and are distinguished by "unfinished" and "unfinished".