In the first sentence, the overlapping words "Cang Cang" and "And" are used. What's so good about it?

Country night

Bai Juyi

In a piece of autumn grass that was grayed by frost, insects were whispering, and everyone around the mountain village disappeared.

Looking at Noda from the front door alone, the moon is in the sky and the flowers are like snow.

In the first sentence, the overlapping words "Cang Cang" and "And" are used. What's so good about it?

A: The first sentence uses two overlapping words, which enhances the rhyme beauty of the poem, makes it catchy to read, and writes the "ash" of frost grass, making its realm more open; Write the "seriousness" of insects and render the sadness of autumn night.