The magic square of nine, revealed on the back of a turtle.
The Lo Shu is a three-by-three grid holding the numbers one to nine so that every row, column, and diagonal sums to fifteen — order discovered, by legend, on the shell of a turtle rising from the river Luo. It is balance made spatial: not symmetry of shape but equilibrium of quantity across a field.
Lo Shu unlocks the idea that arrangement itself can be perfect, that a flat grid can hide deep regularity. It became the template for the Nine Palaces and feng shui's spatial logic — proof that a square of space can be tuned like a chord.