Why did the West Lake receive an umbrella when it encountered snow?

The description of the snow scene in Visiting Dai on a Snowy Night is indirect or side-by-side, and the grandeur of the snow scene is understood through the contrasting manner and posture. Looking at the snow in the middle of the lake is a direct and positive description, which encloses the world in the snow into a landscape painting, and its metaphor is wonderful (two or three are people). The author's writing style is different because the purpose of writing is different. The former focuses on character demeanor; The latter focuses on rendering the desolate ice and snow environment, and entrusts the lonely and lofty feelings of the adherents.