BRIEF INFORMATION ON NEW CONCLUSIONS OF THE DOCTORAL THESIS Thesis title: “Research in Doan Nguyen Thuc and Doan Nguyen Tuan’s poetry of envoy” Major in: Vietnamese Literature Code: 62.22.01.21 Postgraduate: Nguyen Thi Hoa Supervisor: Assoc.Prof.PhD Nguyen Dang Na Institution: Hanoi National University of Education New conclusions of the thesis Doan Nguyen Thuc and Doan Nguyen Tuan’s poetry of envoy in the medieval poetry of envoy has contributed to reappear the diplomatic history of Vietnamese nation with China; reappear the portrait of cultural history; express the spirit of noble cultural exchange of the nation and reflect the itinerary reality that both envoys experienced Their poetry of envoy has not only historical and cultural value but also diversified contents and plentiful forms Accordingly, readers will see the history of struggle on the political front and envoys’ talent in diplomatic field Doan Nguyen Thuc and Doan Nguyen Tuan are envoys and poets who always express their deep patriotism and high-leveled pride about the nation They have optimistic and pure soul and ardent love with nature Doan Nguyen Thuc is characterized as intelligent, talented and humorous Inherited some good qualities from his father, Doan Nguyen Tuan is equally intelligent and talented Through Doan Nguyen Thuc and Doan Nguyen Tuan’s poetry of envoy, we see their deserved positions in the medieval history of Vietnamese literature Representative of Supervisors Postgraduate PhD Tran Thi Hoa Le Nguyen Thi Hoa