What are the three levels of ancient poems describing spring?

The ancient poems describing spring are:

In the spring morning, I woke up easily, and birds were singing everywhere. -Meng Haoran: "Spring Dawn"

In spring, it was dawn before I knew it. It was the chirping of birds that disturbed my sleep.

2. Sunrise is better than fire, and the riverside is as green as blue. -Bai Juyi: "Recalling Jiangnan"

The sun rises from the river, making the flowers on the river brighter than red, and the green river is greener than the blue grass.

3, the spring city is full of flowers, and the cold food Dongfeng Liu Yu is oblique. -Han Yi's Cold Food

At the end of spring, Liu Xufei is everywhere in Chang 'an, and the east wind blows willow branches in the imperial garden at the Cold Food Festival.

4, good rain knows the season, when spring happens. -Du Fu: "Delighting in Rain on a Spring Night"

Good rain seems to pick a season. When spring comes, it will rain quietly at night with the spring breeze.

Wildfire never completely devoured them, but they grew taller in the spring breeze. -Bai Juyi: "Farewell to Ancient Grass"

Ruthless wildfires can only burn dry leaves. When the spring breeze blows, the earth is green.