清张澍编辑的《李尚书诗集》收有李益写的《从军诗序》,序云: 君虞长始八岁,燕戎乱华。出身二十年,三受末秩;从事十八载,五在兵间。故其为文,成多军旅之思。自建中初,故府司空巡行朔野;迨贞元初,又忝今尚书之命,从此出上郡、五原四五年,荏苒从役。其中虽流落南北,亦多在军戎。凡所作边塞诸文及书奏余事,同时幕府选辟,多出词人。或因军中酒酣,或时塞上兵寝,相与拔剑秉笔,散怀于斯文,率皆出于慷慨意气。武毅犷厉。本其凉国,则世将之后,乃西州之遗民与?亦其坎 Qing Zhang Shu’s “Li Shangshu’s Poetry Collection” contains “Preface to the Order of the Army” written by Li Yi, with the order of Yunyun: Jun Yu began his eight-year-long career and Yan Rong chaoshua. Born twenty years, three by the end of rank; engaged in eighteen contained, five in the military. Therefore, the text, into a multi-military thinking. Self-built in mid-early, so the government Sagong Shuo wild; 迨 Zhenyuan early, and 忝 today’s Book of life, since the county, five or four years, Wuyi slave. Although it has been living in the north and south, it is often soldierly. Where the border fortifications and books of the remaining episodes, while the shogunate Electoral, more ci poetry. Or because of the military wine drinkers, or plug the Bingdi, phase and pull sword Pen, casual Huai Wen Si, rate are out of generosity. Wu Yi Li Li. The cool country, then after the world will be the remains of Western states also?