When talking about the poetry of the prosperous Tang Dynasty, you will encounter a question: What is the atmosphere of the prosperous Tang Dynasty? This problem is difficult to describe in words. It seems that it can only be understood but difficult to express in words. Here I would like to borrow a poem by Wang Wan, "Under the Cibeigu Mountain":
The guest travels under the green mountains, and the boat travels in front of the green water.
The tide is flat, the banks are wide, the wind is blowing and the sail is hanging.
Hai Ri is born and the night is over, and Jiang Chun is entering the old year.
How can a rural letter be obtained? Return to Yanluoyang.
This is a poem about traveling and homesickness, but it is still full of vitality. Especially the two couplets in the middle are broad, cheerful and colorful, showing the typical atmosphere of the prosperous Tang Dynasty. Prime Minister Zhang Shuo specially handwritten the couplet "Hai Ri is born and the night is over, Jiang Chun is entering the old year" and hung it in his political hall, requiring later scholars to use this as a standard.