This is a political satire against Tang Xuanzong's belligerence, which may have been written in the tenth year of Tianbao (75 1). After Tianbao, the wars against ethnic minorities in China's border areas became more and more frequent in the Tang Dynasty, and the nature of the wars changed from stopping harassing and stabilizing the border areas before Tianbao to cruel conquest. Years of campaigns have brought profound disasters to the frontier nationalities and the people of the Central Plains.