This article tries to analyzing and proofreading nine pieces of Dunhuang Manuscripts dating from the late 10th century and identifying the dates of them, the study shows that Zhai Shijun or sometimes named Shijun( it means emperor’s messenger or mission, omitting the person’s family name), who has repeatedly recorded in the checked nine pieces of document, is the same person. This Zhai Shijun had played a very important role for the Dunhuang Local Authority of Return to Allegiance Army period of the later 10th century.