The biggest door and window is Du Fu's quatrain, and his poem is that the window of Xiling contains snow, and Wan Li ships at the door. This poem describes the scene of early spring, and four poems describe four scenes, which together constitute a vivid and beautiful landscape painting.
The third quatrain
Du Fu
"Two orioles sing green willows, and egrets cover the sky."
My window framed the snow-covered western hills. My door often says "goodbye" to ships sailing eastward.