五行 (wu xing) is the engine underneath everything in Chinese astrology. Not substances — behaviours. Every stem, branch, animal and season in the system is one of these five.
Two cycles matter. The generating cycle: Wood feeds Fire, Fire makes Earth, Earth bears Metal, Metal collects Water, Water nourishes Wood. And the controlling cycle: Wood parts Earth, Earth absorbs Water, Water quenches Fire, Fire melts Metal, Metal cuts Wood.
Every animal carries a fixed element: Rat and Pig are Water; Tiger and Rabbit are Wood; Snake and Horse are Fire; Monkey and Rooster are Metal; Ox, Dragon, Goat and Dog are Earth. That is the animal's element — the element of a specific year comes from its heavenly stem, which is why not all Dragons are the same.
The calculator counts all five across your four pillars and flags what is strong and what is missing.
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