Eung Bridge, which embodies the consonant "o'" of Sejong City, is the longest pedestrian bridge in Korea with a circumference of 1,446m in commemoration of 1446 when King Sejong proclaimed "Hangul".

It is made with blue ink, and the motif is the night view of the bridge. In order to express the light of the buildings reflected in the "Geumgang" River and the night view of the "Geumgang River", color was designed with blue and purple color separation.

When the ink is first spread out, only blue is visible, but as it dries slowly, a purple of dual shading appears as if a light is shining on the river. Even when you write with a fountain pen, you can see subtle shading.