The sky is overcast with clouds, and smoke from the kitchen rises in the animal-shaped incense burner. "Fog and Thick Clouds": Rendered a gloomy and melancholy atmosphere. Worrying about an Eternal Day says that a day is long and endless-it is because of loneliness and inner sadness that time is particularly long. The author of "Ruinao Selling Golden Beasts" quietly looked at the smoke rising slowly in the golden beast furnace-bored. Express emotions by borrowing scenery.