What does the whole poem mean by "sending Yuan to Xi 'an in the 20th century"?

The light rain in the morning moistened the dust on the Acropolis, and the willow branches and leaves in the inn pavilion were fresh and tender.

Sincerely advise friends to have another glass of wine. It's hard to meet old relatives when you go west from Yangguan.

When sending Yuan Er to Anxi

Tang Dynasty: Wang Wei

The rain in the early morning moistened the dust of the land, the inn of the inn, the branches and leaves of the inn, and a new leaf (1) Hostel Yang Yiyi Liu Chun)

Sincerely advise friends to drink a glass of wine, and it is difficult to meet their relatives when they go out to the sun.

To annotate ...

Acropolis Song: Another name is Anxi, the second envoy of the Song and Yuan Dynasties, or Yangguan Song or Yangguan Triassic.

Weicheng: Located in the northwest of Xi City, Shaanxi Province, it was the ancient city of Xianyang in the Qin Dynasty. υ(y√): wetting.

Guest House: Hotel. Willow color: willow symbolizes parting.

Yangguan: In the southwest of Dunhuang, Gansu, it has been the main road to the northwest frontier since ancient times.

Extended data:

This poem was written by Wang Wei when he sent his friends to the northwest frontier. Later, it was composed for musicians, and it was named "Three Layers in Yangguan". The title of this poem is also called "Twenty-one Xi's for Yuan".

Anxi, the abbreviation of Anxi Duhu, was established by the central government of the Tang Dynasty to govern the western regions, located in Qiuci City (now Kuqa, Xinjiang). Yuan Er was ordered by the imperial court to send envoys to Anxi to protect the government, and Wang Wei went to Weicheng to bid farewell because he wrote this four-line poem.

The length of sentences is strictly limited. This poem is about how to hold a farewell banquet, how to raise a glass frequently at the banquet, how to say goodbye politely, how to be reluctant to go, how to look forward to boarding the plane and so on. I gave up all of them, except for the host's toast at the end of the farewell party: drink this cup again, and I will never see my old friends again when I get out of Yangguan.

The poet, like a clever photographer, took the most expressive photos. The banquet lasted for a long time, and the wine full of special feelings was drunk too much. The words of polite farewell were repeated many times. The time for friends to go on the road is finally coming, and the feelings of farewell between host and guest have reached its peak at this moment. The toast that the host seems to blurt out is the concentrated expression of the strong and profound farewell feeling at this moment.