Shen is the ninth Earthly Branch, belonging to Yang Metal, associated with the Monkey zodiac sign, and corresponds to the Shen hour (3:00–5:00 PM). Shen Metal represents early-autumn metal, internally containing Geng Metal, Ren Water, and Wu Earth; it is characterized by firmness, sharpness, and agility, symbolizing intelligence, adaptability, and dynamic action. Shen Metal embodies the imagery of the Monkey—clever, nimble, and highly responsive to change.
Shen Metal is identified from the Earthly Branches of the Four Pillars in a Bazi chart. If Shen appears in the Year Branch, the native belongs to the Monkey zodiac; if Shen appears in the Day Branch, the Spouse Palace is governed by Shen Metal. Shen Metal is strongest during the Shen month (the seventh lunar month), when it is in season.
A person born on a Geng-Shen day has Shen Metal as the Day Branch Friend; their spouse possesses a resolute character and shares common goals and values.