Is Jiangnan a word or a poem?

"Recalling Jiangnan" is a epigraph name, originally the name of Tang, and later used as a epigraph. There are many other names for this epigraph, such as Wang Jiangnan, Dream Jiangnan, Good Jiangnan, Wangjiangmei, Spring Leave Sorrow, Sleepwalking in Fairyland, Good Anyang, Good Jiangnan Willow. Jin Mang Ji entered Lu Nan Palace. Monotonous 27 words, three-level rhyme. There are seven words and two sentences in the middle, and the duality is appropriate. There is also a bracket in the second sentence. Song people often use double tones.

Bai Juyi's "Remembering Jiangnan Good" is a masterpiece;

Jiangnan is good,

The scenery used to be familiar.

At sunrise, the red flowers in the river win the fire.

This river is as green as blue in spring.

How can we make people not miss Jiangnan?