Historical researchers generally believe that the Anshi Rebellion in the Tang Dynasty was the turning point of the Tang Dynasty. The Anshi Rebellion not only caused the decline of Tang Dynasty's national strength, but also hurt the mind of the literati.
Since the prosperous Tang Dynasty, people in the Tang Dynasty have always been proud of the grand and open mind of ten people. When they look at everything in the world, they all have an eternal heroic spirit, just like the confidence that "once they climb to the top of the mountain, they will see other mountains look short under the sky"; Still the natural feeling of "bright moon, the sea is full at this time, and the horizon is * * *".
After the late Tang Dynasty, the dream of literati began to ignite. The growing border wars and warlord regimes have made people miserable. Scholars clearly saw this hopeless and declining era, and they also converged on the previous hopes and the resulting excitement, and finally abandoned the psychological tendency of extroversion and opening up. In this situation, people in the late Tang Dynasty gradually became depressed, and poetry inevitably had an eschatological color.