Cheongnyong(blue dragon), located in the eastern portion of the constellation chart,
symbolizes seven of the 28 constellations. Beliefs in the Five Elements led to the entrenchment
of ‘four cardinal deities', making cheongnyong the guardian deity of the underworld. In early
Goguryeo tomb murals, the appearance of cheongnyong seems rather awkward due to
inharmonious blends of dissonant physical features, having derived from various anteceding
animals.  With time, however, as its importance within the motifs of tomb murals increased,
clashing parts gradually evolved to be more congruous with one another and the creature finally
acquired its characteristically arcane look. The fineness of depictions and brilliantly colors of
cheongnyong from the 6th century onwards express vigor and liveliness and display the sophisticated
artistry of Goguryeo painters.