What are the characteristics of Du Fu's poem Ascending the Mountain in terms of scene blending?

Climb the peak

In the sharp wind from the vast sky, apes are sobbing, and birds fly home on the clear lake and white beach.

Leaves fall like the waves of a waterfall, and the Yangtze River stretches as far as the eye can see.

I came from three thousand miles away. With the sadness of autumn, with my sorrow of a hundred years, I climbed this height alone.

Bad luck has formed a bitter frost on my temples, and heartache and fatigue are a thick dust in my wine.

The first half of this poem describes the scenery, and the second half expresses the emotion, both of which have their own merits in writing. The first couplet focuses on describing the specific scenery in front of us, like a painter's meticulous brushwork, showing shape, sound, color and state one by one. The second couplet focuses on rendering the atmosphere of the whole autumn, like a painter's freehand brushwork, so it is only appropriate to convey the mind and let readers supplement it with imagination, and express their feelings in three ways, vertically (in time) and horizontally (in space).