What is the description of the first sentence in the quatrains of ancient poetry? Is "two" a real reference?

The first sentence of the ancient poem Jueju describes the scenery, describing two orioles singing on the green willow and a row of egrets flying in the sky.

"Two" means there are two orioles. This sentence is anthropomorphic, actually referring to two orioles on a tree. Using anthropomorphic techniques, we can describe orioles more vividly.

From the mouth of the Tang Dynasty poet Du Fu.

The full text is:

"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.

Two orioles are singing on the green willows, and a line of egrets are flying in the sky, overlooking the snow on the mountain, and Wan Li's boat stops in front of my door.

Extended data:

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Creative background:?

In 762 AD, at the height of the Tang Dynasty, Chengdu Yin entered Korea. At that time, due to the "Anshi Rebellion", Du Fu once avoided Zizhou. In the second year, the rebellion was put down and Yanwu returned to Chengdu. Du Fu also returned to Chengdu Caotang. At that time, he was in a good mood Faced with the vitality of this school, he couldn't help writing this poem.

References:

Baidu encyclopedia-quatrains