What does the poem "Thousands of Willows Outside Chilan Bridge" mean?

"Four Quatrains on Xiaoxie in Qinhuai"

There are thousands of willows outside Chilan Bridge,

A Qingxi River rises in the evening tide.

The goose pipe whispers to urge the moon to rise,

I don’t know what to do, but I don’t know what to do.

The fireworks in the south have lost their old news.

There are no songs, no laughter, no worries.

Talented people are poor, beautiful people are old,

When the heart is broken, the skirt was worn in vain.

The Yanqukong Zhuan "Swallow Notes" is like a Leijie drum making a light boat.

Poor Sanwu Fancy Moon,

It once looked round to the outside of Linchun Pavilion.

Alas, the wine is half gone in his voice,

Shui Tian’s night talk is always boring.

There is no need to re-count the dream of Huaxu,

The declining willows and autumn wind will see the Six Dynasties.

"There are thousands of willow trees outside Chilan Bridge", which means there are many willow trees beside Chilan Bridge. In Chinese classical poetry, Liu and Liu are homophonic, and speaking of Liu is usually associated with feelings of separation and separation. However, in this poem, willow is just a scenery and a symbol. Judging from the whole poem, it is a witness to history that transcends time and space, "The declining willows and autumn wind see the Six Dynasties." It is similar to the sentence in "Spring Moonlight Night on the River": "Who by the river sees the moon for the first time? When does the moon on the river shine on people for the first time? Life is endless from generation to generation, and the moon on the river is only similar year by year. I don't know who the moon on the river is waiting for, but I see the Yangtze River sending water." Wonderful.

It expresses the author's feelings about history and the passage of time