Qian -- The Sky. Metal, light, reflexion. Western directions. Medical aspect: Lungs, large intestines, skin. Hot spices (yes, white; they do not belong to the red group!) like ginger and pepper. Alcohol. Space, motion, aviation, technics.
The central sqare contains all the elements as a kind of situation map. Each of the patches points to the related square. So the center is a kind of map for the whole panel. And what is in the middle of the map? Another nine-patch aiming into infinite microcosm? No, just five colors in dynamic motion, as the elements are in permanent exchange.