A reading is not a science — it is a mirror. Use it to view yourself from one step away.
Four Pillars uses the three axes of traditional East Asian personality philosophy — the Day Master (日干), the 12 Special Stars (神殺), and the Ten Gods (十星) — to derive 1,200 character combinations. All ephemeris computation follows the canonical lunar-javascript library: lunar↔solar conversion, solar-term boundaries, and major-cycle directions all share that single source of truth.
How the three cards are derived
Origin (根源)
ORIGIN · from the Day Master (日干)
The Day Pillar (日柱) — the pillar of your birth day — contains two characters. The upper character, the Heavenly Stem (天干), is called the Day Master (日干). There are ten possible Day Masters: 甲·乙·丙·丁·戊·己·庚·辛·壬·癸. Each maps to one Origin card (O01–O10) and describes your core temperament and instinctive energy.
Gift (天賦)
GIFT · from Special Stars (神殺)
Traditional BaZi scholarship recognises dozens of special stars (神殺). Four Pillars selects a curated set of representative stars with deep modern relevance and identifies the one that appears most prominently in your chart. Charts with no activated star receive G12 — Balance.
Vocation (召命)
VOCATION · from the Ten Gods
Determined by the Ten Gods (十星) — a system of ten relationship categories derived by comparing your Day Master to every other stem and branch in the chart. Depending on whether the Day Master generates, controls, or is generated/controlled by each element, relationships like Bigyeon, Sigshin, Pyeonjae, Jeong-gwan, and Jeongin are assigned. The dominant Ten God across your full chart becomes your Vocation card.
What this reading is not
A chart does not determine your future. Two people with the same chart do not live the same life — the card is a map of possibility, not a script. Medical, legal, or financial decisions belong to experts, not interpretation. When the birth time is unknown, a three-pillar reading is provided, but hour-dependent claims (children, late-life precision) are less reliable.