The blue sky is usually changed into a four-word word after washing.

Interpretation: The blue sky is as clear as washing. Describe sunny weather.

appear

place

: Zhang Song Gan Yuan's "Crossing the Water Jump" Word: I know that "the blue sky in Wan Li is like a wash, and the road is cold for ten minutes, and the curtain shakes."

show

example

At that time, the blue sky was like washing, and a flock of geese descended from the sky and flew in a herringbone shape.

-Shen Congwen's answer to "Long River Autumn (Quiet in Motion)"