Wu is the yang-fire branch (hidden Ding, Ji), the 5th month, 11 am–1 pm — the blaze at its peak.
Wu is fire at its zenith — light, heat, gallop. Friction: the Zi–Wu clash, Chou–Wu harm and Wu–Wu self-punishment; support: the Yin–Wu–Xu fire frame and Wu–Wei harmony. Wu's lesson is pacing — turn sprints into rhythm.