At the heart of Guiyang, the Miao legend of the Bird of Life is translated into a sequence of unfolding spiral evolute curves. These curves generate an isomorphic system: large and small spatial units follow the same rule, linking the composition of the square to the scale of individual encounters.

Ceremonial places and everyday social spaces interweave within this shared geometry. The cultural symbol becomes an operative method of organising public life, allowing a civic square to carry ritual associations while remaining a place for ordinary gathering and movement.