1. In terms of subject matter content, poems on history and homesickness are gradually increasing, while creations on social life, women and love are relatively decreasing.
2. Emotionally and ideologically, it reflects a kind of melancholy, sadness and sadness with negative colors, which is related to the turbulent social background and decline at that time.
3. Artistic expression, carving words, liking to use allusions and even piling up allusions lead to the tendency of "writing like poetry" and "discussing like poetry".
In a word, the poetry in the middle and late Tang Dynasty showed various styles and characteristics in the poetry creation under the prosperous Tang Dynasty.