The expression technique of burning white mountain blue and white flowers by riverside birds.

Positive contrast is used here: positive contrast refers to setting off something with the same nature or characteristics as it.

Du Fu's quatrains: "The whiter the Jiangbi bird, the blue-and-white mountain will burn. I saw it again this spring. When is the year of return? " With "Jiangbi", "Bird White" and "Mountain Blue" as the background, the colors are in harmony with the scenery.