People say that the sunset is the end of the world, and the end of the world will not see home.
Hating bishan is blocked by each other, and bishan is still covered by twilight clouds.
—— Song Dynasty: Li Qian's "Nostalgia"

Li Qian was a very influential Confucian scholar during the Northern Song Dynasty, as well as an important philosopher, thinker, and educator, who spent his life teaching and founded Xujiang Academy, which scholars called Mr. Xujiang. He wrote well and wrote a wealth of books throughout his life. He occasionally writes poems, reads his poems, really feels not good, and the gap with poetry is too far, only this "Nostalgia" poem, but it is sincere and worth reading.
Homesick poems, naturally, are written by poets in other places, and when they miss their loved ones, it is the true feelings that are revealed, often sincere and moving. Homesickness, everyone is similar, the feelings of others, and the feelings of their own, are very easy to resonate. Therefore, if the love is true, the poems written will naturally be good.
"People say that the sunset is the end of the world, and the end of the world will not see home", people say that the place where the sun sets is the edge of the sky, that is, the end of the earth. But I looked at the end of the world, and I saw the end of the earth, but I couldn't see home. These two verses are sad far from home. Here is an allusion to the use of chemicals. Emperor Jinyuan asked the infant Emperor Ming of Jin, "Do you think Chang'an is farther away from the sun?" Emperor Ming said on the first day: "The sun is farther away, and I have never heard of anyone coming from the sun." Emperor Yuan was very surprised by his answer, and the next day in front of the courtiers, he asked him again, but Emperor Ming changed his mouth and said, "The sun is near." Emperor Yuan was stunned and asked him why his answer was different from yesterday's answer. Emperor Ming explained: "If you look up, you can see the sun, but you can't see Chang'an. ”
"I hate the Bishan Mountains, and the Bishan Mountains are still covered by the twilight clouds", these two sentences explain the reason why you can't see home at the end of the world, the home is thousands of miles away, there are overlapping green mountains in the middle, and there are heavy twilight clouds, covering the heavy green mountains. A leaf obstructs the eye, does not see Mount Tai, the mountain obstructs the clouds, and it is impossible to see home.
The four verses of the poem, divided into four layers of meaning, are progressive layer by layer, deepening the emphasis on the distance from home sentence by sentence, and indirectly exerting the homesickness to the extreme.