Appreciation of Du Fu's two poems: What are the characteristics of these two poems in scenery writing?

The first song:

On the basis of bright and broad pictures, three or four sentences turn to a concrete and vivid description of the early spring scenery.

The second song:

The artistic feature of this poem is to write sadness with joy. Only by saying that spring is harmonious can we compare the poet's eagerness to return home.

That's it in a nutshell. O(∩_∩)o Haha ~ Pick me!