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On the west side of the river this night, there was not a cloud in the whole blue sky. I looked at the moon on the deck and thought of the old general Xie in vain. I have poems; I can read. He hears others, but it's not mine. Tomorrow I will raise my sail and leave leaves behind me.
This poem is regarded as "I will sail and sail tomorrow" when Li Bai's youth was not famous, and it is suspected that it was written when he returned to the river to bury his friend Wu Zhidao in Dongting in the autumn of the fifteenth year of Kaiyuan (727). Niuzhu, a mountain near the Yangtze River in the northwest of Dangtu, Anhui Province, with its northern end protruding into the river, is a famous stone-picking rock.
The original annotation under the title of this poem says: "This is the place where Xie He sings history." According to the Biography of Wen Yuan in the Book of Jin, when I was young, I was lonely and rented a house for a living. General Xie Shang of Zhenxi guards Niuzhu. He crossed the river by boat on autumn night. He listened to the poem satirizing himself on the chartering boat and enjoyed it very much, so he invited Hong to talk about it on the boat until dawn.
Justin was praised by Xie Shang and became famous from then on. The so-called "nostalgia" in the title refers to this matter. The first sentence comes straight to the point, pointing out that "Niu Zhu sleeps at night." The second sentence is about the night view of Niuzhu, showing a blue sky and cloudless Wan Li. The vast sky and the vast Xijiang River.
Blending in the night shows the vastness of the realm, and the feeling of being carefree and far away when the poet is in it naturally blends in. The third and fourth sentences are from "looking at the moon" in Niuzhu to "thinking about the past and thinking about the future". Xie Shangniu met Yuan, a poetic story, crossing the river on the moon.
The coincidence with the place in front of the poet (Niuzhu Xijiang River) and the scenery he met (blue sky and bright moon) is the main reason for the poet to "look at the moon" and "miss the past", but it is also because this vast and distant realm itself is easy to trigger associations with ancient and modern times.
Between the infinity of space and the eternity of time, people can often trigger and transform each other in their ideological activities. Chen Ziang's feeling "Before me, where was the past era? Behind me, are the future generations? " (Youzhou Tower) The vast land facing the north is an obvious example.