Qian-jia Background of Qiu's Notes for Du Fu's poetry and Philosophy

How did Qiu's Notes for Du Fu's poetry came into being? What philosophy did Qiu's Notes for Du Fu's poetry reflect? This paper focuses on these two issues to illustrate the study of Chinese classical poetry through Qiu's Notes for Du Fu's poetry under the background of the Qian-jia textual research school and tries to discover the theoretical basis for Qiu Zhao-ao's Notes for Du Fu's poetry.Qiu Zhao-ao shifted to the study of notes for classical poetry,his four-in-one philosophy ran through all his works,i.e.notes for interpretation,notes for ancient quotations,chronicles of Du Fu's poems and basis of Du Fu's poems.