What do "willow", "spring water in a river" and "Yellow Crane Tower" represent in ancient poetry and culture respectively?

"Liu" and "Liu", like "stay", all mean parting.

"Weicheng is rainy and dusty, and the guest house is green and willow. There is no reason to go out for a glass of wine. "

-Wang Wei, "Sending Yuan and Two Stones to Anxi"

"A river of spring water" trickles eastward, indicating that you are constantly worried.

"How much sadness can you have, just like a river flowing eastward."

-"Yu Meiren" Li Yu

The Yellow Crane Tower is a masterpiece of classical and modern casting, poetic and artistic architecture. Located at the intersection of mountains and rivers, it caters to the folk customs of the Chinese nation, the spatial consciousness of being close to nature and the philosophical concept of advocating the universe. Climbing the Yellow Crane Tower will not only make you feel happy, but also make your mind and the image of the universe penetrate and blend with each other, thus purifying your mind. This is probably the reason why the beautiful charm of the Yellow Crane Tower has experienced wind and rain and the sun and the moon. Together with Wang Tengting and Yueyang Tower, it is listed as the three famous buildings in the south of the Yangtze River.

The Yellow Crane Tower has to express different images in different poems, and generally has the meaning of overlooking and missing hometown and expressing the feelings of crossing the ages.

In the past, the yellow crane carried saints to heaven, but now only the yellow crane tower is left.

The yellow crane never revisited earth, there have been no long white clouds for thousands of years.

Every tree in Hanyang has become clear due to sunlight, and Nautilus Island is covered with sweet grass.

But I looked at my hometown, and the twilight was getting thicker, and the mist of sadness was filled on the river waves. "-"Yellow Crane Tower "Cui Hao

"Yellow Crane Tower sends Meng Haoran to Yangzhou" Li Bai

Old friends frequently waved to me, bid farewell to the Yellow Crane Tower, and traveled to Yangzhou in this beautiful spring filled with catkins and flowers.

My friend's sail shadow faded away and disappeared at the end of the blue sky, only seeing the first line of the Yangtze River and heading for the distant horizon.