Who knows the full text of Cao Pi's "Yan Ge Xing", how many years this poem was written, and what is the writing background?

Cao Pi Yan sings in the autumn wind, the weather is bleak, the plants and trees are shaken and exposed to frost, and the flock of geese leave for the south. I miss you and your guests, and I feel heartbroken. I miss my hometown, so why should stay for a long time send it to the other party? My humble concubine kept her room alone, and she was afraid to forget her worries, so she didn't feel her clothes stained with tears. A short song can't be long. The bright moon shines on my bed, and the stars flow west to night is still young. Petunia and Weaver Girl look at each other from a distance. Why should I limit the river beam? This is the first of two songs written by Cao Pi. Yan Ge Xing is a Yuefu topic, which belongs to Ping Diao Qu in Xiang He Ge. It is similar to Qi Qi Xing and Wu Chu Xing, and both of them reflect the life in their respective regions and have their own musical characteristics. Yan (Yān) was the name of the vassal state in the Western Zhou Dynasty and even in the Spring and Autumn Period and the Warring States Period, and its jurisdiction was about present-day Beijing, northern Hebei, southwestern Liaoning and other areas. This is the border area between the Han nationality and the northern ethnic minorities. Since the Qin and Han Dynasties, wars have often occurred. Therefore, the rulers have sent heavy troops to guard here over the years. Of course, there are many kinds of shaking services such as building cities and transferring transportation. According to the recent facts, in the 12th year of Jian 'an (27), Cao Cao's northern expedition to Wuhuan took place in the northern part of this ancient Yan State and now Xingcheng, Liaoning Province. As early as the Qin dynasty, there were works reflecting the suffering of the war corvee in this area, "Be cautious when giving birth to a man, and feed a woman with a breast." The folk song "Don't see the Great Wall, the bones support each other" was even more famous in the Han Dynasty, "Drinking Horses in the Great Wall Cave". Cao Pi's Yan Ge Xing is the inheritance and development of this kind of literary works in terms of ideological content. Guo Maoqian's Poems of Yuefu quoted Yuefu Solving Problems as saying: "Wei Wendi's two songs" Autumn Wind "and" Another Day "have changed in time sequence, and the women have nothing to complain about." He also quoted Yuefu Guangti as saying: "Yan, the place name is also. It is said that a good man served in Yan, and for this reason. " It is correct to understand the content of the work in this way. There are no ancient words in Yan Ge Xing, and this tune may have originated from Cao Pi. This work reflects the historical phenomenon of 4 years since Qin and Han Dynasties, and it is also the social reality of Jian 'an period where he was close, showing the author's concern and sympathy for the sufferings of the lower classes.