What is the scene described by Liu Yong in the first three sentences of "The Joy of Ancient Poetry Reading"? What's the role?

At the beginning of the word, three words are used to describe the beauty of Jinming Pool: "Flowers reflect dew, tobacco soaks green, and the spirit marsh waves are warm"-flowers with dew are clearly reflected in the pool, ethereal grass extends into the green pool, and the water in the pool is warm. From "Exposing Flowers", "Tobacco" and "Warm Waves", we can know that it is a morning with spring flowers, while "Reflection", "Immersion Garden" and "Lingfen" point out the clearness and vastness of the pool water. These three sentences not only describe a picturesque picture, but also make people feel a fresh breath of spring morning, full of beauty and vitality, which lays a bright and warm tone for the whole poem.