When the author is appreciating many works, I often see whether they are quotations or calligraphy works: "Geng Xin's articles are more mature with time, and Ling Yunjian's writing is full of creativity." There is also common confusion in many articles. I also agree that it is Gengxin. Recently, when I was reading Tang poetry, I found that there was only one word difference in the introduction of Yu Xin. I don’t know which version is correct. Looking at Tang poetry, we know that Du Fu, a great poet and poet of the Tang Dynasty, wrote in "Six Quatrains of Play": Yu Xin's articles become more mature as time goes by, and Ling Yunjian's writing is full of ideas. Today's people sneer at the spread of Fu, but they don't realize that the sages of the past are afraid of those who come after them. This is the first poem of "Six Quatrains", about Yu Xin. Du Fu also said in "Recalling Li Bai in Spring": "Refreshing Yu Kaifu". In this Liujue poem, it is pointed out that the style of Yu Xin's later articles (also referring to poems and poems) is more mature: "Yu Xin's articles are more mature with age, and Ling Yunjian's writing style is vertical and horizontal." In order to make it clearer, I checked the dictionary recently. The two characters "Yu" and "Geng" are both surnames. The former is pronounced "yu" and the latter is pronounced "geng". Searching for relevant information, we learned that Yu Xin (513-581), whose courtesy name was Zishan, was born in Xinye, Nanyang (now Xinye, Henan Province) during the Northern and Southern Dynasties. His father was Yu Jianwu, a famous court scholar in the Liang Dynasty. He was smart and well-read since he was a child, especially Zuozhuan. At the age of fifteen, he became a lecturer in the East Palace of Xiao Tong, Prince Zhaoming, and at the age of nineteen, he became a copyist in the East Palace of Xiao Gang. Their father and son, as well as Xu Ying and Xu Ling, who also served in the East Palace at the time, were deeply favored by Xiao Gang and were important writers of the palace-style poetry advocated by Xiao Gang, which was known as "Xu Yu Style" at the time. During the Hou Jing Rebellion, he served as the Jiankang Order, and the entire army retreated and fled to Jiangling. In the third year of Emperor Chengsheng of Liang Yuan Dynasty (554), he was ordered to send an envoy to the Western Wei Dynasty. At that time, the army of the Western Wei Dynasty was heading south to invade Jiangling. He was left in Chang'an and served in the enemy country. Later, he served in the Northern Zhou Dynasty, where he reached the rank of Hussar General Kaifu Yitong Sansi. Although his official position was high, he felt very painful in his heart and often missed his homeland. Later, the Chen Dynasty asked the Northern Zhou Dynasty to let him return to his country, but the Northern Zhou Dynasty refused to release him because he cherished his literary talent. Finally died of old age in the north. Yu Xin's important works of self-compassion include "Twenty-seven Poems on Praise of Praise", one of which is: The pavilion is desolate and the barriers are far away, and it is miserable and dusty. Close the door and face Baidi, and the shadow of the city enters the Yellow River. The autumn wind bid farewell to Su Wu, and the cold water sent farewell to Jing Ke. Who said that he was so powerful that he sang in the tent when he got up in the morning. There are also chapters such as "Recounting the Huai with Zhang Shizhong" and "Situ Bao, the Injured King", whose moods are completely consistent with "Impersonating the Huai". What we must mention are a few five-character poems sent to friends, such as: The road to Yuguan is long, and the messengers in Jinling are sparse. I shed a thousand lines of tears alone and opened a book for you thousands of miles away. ——"To Wang Lin" An old friend is thinking about me at this time in my life. Don't wait on Shanyang Road to hear the sadness of the old flute. ——"Send to Xu Ling" These poems express in a few words the pain of missing his motherland thousands of times. The realm is broad and the emotion is deep, surpassing Xie Tiao's poems. In short, Yu Xin's later poems have a completely different appearance from the early ones in terms of ideological content and artistic style. His later poems not only express the pain of life experience, but also the wind and sand atmosphere of the northern frontier. Like "the formation of clouds is flat and motionless, and the autumn leaves are about to fly"; "the shooting stars shine in the mirror at night, and the beacon fires burn the plains at night"; "the light clouds are floating on the horse's feet, and the bright moon is moving the bow and rein" (all the above can be seen in "Xiao Yong Huai"); "Hu Jia" In the distant night, the horses are neighing in the crowd" ("Sending the Army to the Gorge with the King of Zhao"): "The horses neigh in the valley, the bows are cold and the mulberry trees are singing" ("Fu Wen Safari") and other poems. Yu Xin also developed in the form and rhythm of poetry. His new five-character poems such as "Feasting with Envoys", "Send to Xu Ling", and "Autumn Day" coincide with the later five-character rhymed poems and five-character quatrains of the Tang Dynasty in terms of rhythm. In the form of seven-character poems, "Yan Ge Xing" is larger than Bao Zhao's seven-character poems. "Crying in the Night", "Watching Solo Flying Geese on an Autumn Night", and "Two Poems on behalf of others", the number of clauses, composition, and antitheses are It can be seen that it is also the pioneer of Qilu and Qijue in the Tang Dynasty. The large number of allusions is an important feature of his poetry. Some poems, such as those mentioned above, use allusions very creatively, flexibly, and naturally in tune, which enhances the power of artistic expression. However, some poems are also obscure in meaning due to too many allusions. Yu Xin's poems initially merged the poetry styles of the North and the South. He was the last outstanding poet in the Northern and Southern Dynasties and a pioneer of Tang poetry. He had the most direct influence on the Tang people, so he was highly valued by the poets of the Tang Dynasty. Du Fu said: "Yu Xin's articles became more mature with age, and Ling Yunjian's writing style was full and horizontal." He also said: "Yu Xin was the most bleak in his life, and his poems in his later years moved Jiangguan." This is a correct evaluation of his later works. Judging from the above information, the correct one should be to write Yu Xin.