Search deep into the alleys for grass in the city, and the river city is full of flowers behind closed doors. What is the role of the two images of grass and flowers?

Grass; modified with "deep", it shows that the grass is growing luxuriantly. If you look around and enter the alley, you can see that the grass in the market is luxuriant, and it also shows how deeply the friends are hidden.

Flowers; In the early spring of Yangzhou, the fragrance of flowers overflows, showing the leisurely life of friends in seclusion and being with nature, showing the poet's yearning for this kind of life and his love for nature.

In addition, the red and green colors of the flowers and plants form a sharp contrast, highlighting the beauty of the entire environment. .