There is a flower called "Moon Beauty." It opens only after midnight and withers before dawn. When it opens, each petal lets out a sign. Hundreds of fine silvery threads tremble at its center. The flower puffs out a ring of smoke. The whole room is instantly filled with fragrance.
This description of the night blooming cereus prompted the Sui Emperor to begin building a waterway that would run from north to south. He dreamed of taking his favorite lady on a dragon boat to see this flower.
Folks got tired of the endless forced labor and overthrew the Sui. The Emperor never got to see the magical flower. But we will.