朱东润主编的《中国历代文学作品选》中篇第一册岑参《走马川行奉送封大夫出师西征》一诗“解题”中称此诗为天宝十三载(754年)岑参随封常清西征播仙时所作。“播仙城即左末城。距播仙城五百里有且末河,又名左末河,即今新疆维吾尔自治区境内的车尔成河,是征播仙时的必经之地。这里的走马川即左末河。”自此之后, Selected by Zhu Dongrun’s “Selected Works of Chinese Literature for All Generations” in the first volume of the “Introduction to the Western Propaganda of the Propagation of the Letter by the Ma Dachuan Line”, a poem entitled “Solving the Problem,” calls this poem a set for the thirteenth year of Tianbao (754 years). The Qing Dynasty made the broadcast of Xian. “Born Xiancheng is the city at the end of the left side. There are five hundred miles from Bianxian City and the last river, also known as Zuohe River, is now the Cheercheng River in the Xinjiang Uygur Autonomous Region. It is a must-see when sowing the immortals. The left-last river." Since then,