Literature Reference: The strategic stronghold of the nation is Youdu, which commands respect from the eastern tribes and controls the northern barbarians. Source from 'Yan Ge Xing'.
幽: Serene and concealed, it embodies elegance and composure.
都: The metropolis, the capital. Symbolizing a position of prominence and considerable influence.
Meaning: Youdu symbolizes profundity, mystery, and significant status, representing the nation's strategic stronghold and dignity.