"This Jiujiang official. My blue sleeves are wet "is a poem in Bai Juyi's Pipa Trip, which means: Jiangzhou Sima's skirt is soaked with tears." Jiangzhou Sima refers to Bai Juyi (then Jiangzhou Sima), and blue is the color of official clothes. The poet was moved by the fate of the pipa girl, so that his face was full of tears and his blue shirt was wet. This poem expresses the author's deep sympathy for the pipa girl.