In the process of digitalizing ancient documents about Can Chanh Palace, Nguyen Tan Anh Phong and his collaborators discovered one of the two glass paintings currently hung at the Department of History, College of Sciences, Hue University is the precious painting which used to belong to Can Chanh Palace in the Imperial City.

Being well-known as the most beautiful and dangerous pass in Vietnam, Hai Van Pass is located on the border between Thua Thien Hue Province and Da Nang City.