What is the classic poem that expresses nostalgia?

As long as the heaven and earth, and as bright as the sun and the moon. ——Qu Yuan's "Fording the River" in the Warring States Period

The road is long and long, and I will search up and down. ——Qu Yuan's "Li Sao" during the Warring States Period

The whole world is turbid and I am alone in my purity; everyone is drunk and I am alone in my sobriety. ——Qu Yuan's "The Fisherman" in the Warring States Period

I still have good intentions, and even though I died nine times, I still have no regrets. ——Qu Yuan's "Li Sao"

The old man is helpless and has ambitions for thousands of miles; the martyrs are ambitious in their old age. ——Three Kingdoms·Cao Cao's "The Turtle is Longevity"

Nostalgia is to remember the past, referring to the nostalgia of the past or old friends. Its part of speech is verb. Old objects, old friends, hometown and the passing years are the most common subjects of nostalgia.

More verses:

A good man must have a fast horse, and a fast horse must have a good son. ——Folk Song of the Northern Dynasties·"Song of Broken Willows"

Xingtian dances with relatives, and the strong will is always there. ——Jin Dynasty Tao Yuanming's "Thirteen Poems from the Classic of Mountains and Seas"

Straight as a red silk rope, as clear as jade pot ice. ——Bao Zhao, Southern Dynasties and Song Dynasty, "Yin of Dai Baitou"

The strong wind knows the strong grass, and the rough wind knows the sincere minister. ——Li Shimin of the Tang Dynasty, "A Gift to Xiao Yu"

I wish you to learn from the pine trees, but be careful not to be like a peach or a plum. ——Li Bai of the Tang Dynasty, "Two Poems of Huang Huoshang as Gifts to Wei Shiyu"

The time of poverty is here.

Paintings one by one - "Song of Righteousness" by Wen Tianxiang of the Song Dynasty