In Du Fu's poem, he said: Geng Xin's articles are more successful when he is old: how do you understand this?

Geng Xin experienced two catastrophes in his life, the post-Beijing Rebellion and the Gangneung Rebellion, which became the traumatic memory that Geng Xin could never erase in his life, and was also the theme of his repeated creation. Traumatic memory caused his cognitive abnormality and sensitivity, and kept his creative tension unchanged, which was also the driving force for "the older Geng Xin's articles, the more successful they became". Generally speaking, Yu Xin's literary creation can be divided into two periods, with his 42-year-old mission to the Western Wei Dynasty as the boundary. In the early Liang dynasty, his works were mostly palace-style, with light colors and rich beauty of words. After poetry and Fu were imprisoned in the Northern Dynasties, they expressed a lot of homesickness and sadness about their own life experiences, and their styles became vigorous and sad. Therefore, Du Fu said, "Yu Xin's articles are old and successful, and his brushwork is vertical and horizontal."