Wang Wei sent Yuan Ershi to Anxi backstage.

The poem "Sending Yuan to Twenty Shores Xi" is concise in language and vivid in image. Because it expresses rich and profound feelings with ingenious artistic techniques and expresses everyone's reluctant feelings, it was composed into a song in the Tang Dynasty and became a farewell song at the banquet, called "Yangguan Song". In Bai Juyi's Five Poems on Wine, there is a sentence: "Don't refuse to get drunk when you meet, listen to the fourth sound of Yangguan", and indicate that "the fourth sound means' advise you to drink more wine'". Wang Wei's poem has another title, "Three folds in the sunshine", because when singing, the first sentence is not folded, and the other three sentences are sung again. But some people think that only the last sentence overlaps three songs. According to Bai Juyi's Four Tones, the first sentence should not overlap, and the other three sentences overlap, otherwise the sentence "advise you" can't be "four tones". Judging from Bai Juyi's poems, the Tang Dynasty should be a "person who went out of Xiyangguan for no reason" who repeatedly sang this poem.

The first two sentences of this poem describe the time, place and atmosphere of farewell, creating a melancholy atmosphere for farewell. In the morning, the Acropolis Guest House extends from east to west, and the postal road has no end. Willow trees surround the guest house and the postal road is on both sides. All this is a very common sight, but it is picturesque and lyrical. Yu Chao plays an important role here. The rain didn't last long in the morning, but it stopped as soon as it got wet. On the avenue starting from Chang 'an West, cars and horses crisscross on weekdays, and it is dusty. When I saw you off, the rain suddenly stopped, the weather was fine, and the road looked clean and refreshing. The word "light dust" means wet, and it is used in a measured way here, indicating that the rain is clear and the dust is not wet, just right, just like God's will, and a light dust road is specially arranged for people who travel far away. Hostel, originally a companion of travelers; Willow is a symbol of parting. Choosing these two things is the author's intention to say goodbye. They are usually associated with sadness and no hate, and show a fascinating emotion. But at the moment, because of a shower of morning rain, there is a clear and fresh look-"the guest house is green and willow is new in color." On weekdays, the roads are dusty, and the willow color on the roadside is often shrouded in gray dust and fog. It takes a rain to wash its green color again, so "new" is because of the new willow color, which reflects the green guest house. In a word, from clear skies to clean roads, from green guest houses to green willows, a picture with fresh and clear colors has been formed, which provides a typical natural environment for this farewell. This is a affectionate parting, but it is not a sad parting. Instead, it reveals a light and hopeful mood. The rhymes of words such as "light dust", "green" and "new" are soft and lively, which strengthens the reader's feeling.

There are strict restrictions on the length of quatrains. This poem, about how to hold a farewell banquet, how to raise glasses frequently at the banquet, how to say goodbye euphemistically, how to be reluctant to part with it, how to pay attention to the distance after boarding the ship, etc., was abandoned, except for the host's toast at the end of the farewell banquet: "Drink this cup again, and you will never see your old friend again when you 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 blurted out by the host is the concentrated expression of the strong and profound farewell feeling at this moment.

Three or four farewell words are a whole. If you want to deeply understand the deep feelings contained in this parting exhortation, you can't help but involve "going to the West to get through Yangguan". Yangguan, located at the western end of Hexi Corridor, is opposite to Yumenguan in the north. Since the Han dynasty, it has been the channel for the mainland to go out of the western regions. The national strength of the Tang Dynasty was strong, and there were frequent exchanges between the mainland and the western regions. Joining the army or going to Yangguan is a desirable feat in the eyes of the prosperous Tang people. But at that time, the western part of Yangguan was still poor and barren, and the scenery was very different from that of the mainland. Although it is a feat, my friend's "going west to Yangguan" has to go through a long March and be prepared for the hardships and loneliness of going alone. Therefore, when he left, "advise you to drink more wine" was like a cup of rich emotional nectar, which soaked all the rich and profound friendship of the poet. There is not only a feeling of parting, but also a deep concern for the traveler's situation and mood, and sincere wishes for the future. For the party who saw him off, persuading the other party to "have another glass of wine" is not only to let his friend take away more of his friendship, but also to delay the breakup intentionally or unintentionally and let the other party stay for a moment. The feeling that "people have no reason to go out of Xiyangguan" belongs not only to walkers. Parting, I have a lot to say, but I don't know where to start at the moment. On this occasion, there is often silence. "Advise you to drink more wine" is a way to unconsciously break this silence and express the rich and complicated feelings at the moment. What the poet has not said is much richer than what he has said. In short, although three or four sentences are only moments, they are extremely rich moments.

This poem describes the most common parting. It has no special background, but it has its own deep feelings of farewell, which is suitable for most people to sing outside the banquet. Later, it was compiled into Yuefu and became the most widely circulated and longest-lasting song.