Zi Wei Dou Shu: A Complete Beginner's Guide to the 12 Palaces and 14 Major Stars

Zi Wei Dou Shu (紫微斗数, "Purple Star Astrology") is a Chinese birth-chart system that maps twelve life domains — personality, career, wealth, relationships, health and more — by placing fourteen major stars into twelve palaces based on your birth date and hour. It is one of the two major birth-chart systems in Chinese metaphysics, alongside BaZi (the Four Pillars).

What is Zi Wei Dou Shu?

Zi Wei Dou Shu is a deterministic chart system: the same birth data always produces exactly the same chart. Nothing in the chart is improvised or guessed. You supply a lunar birth date and a two-hour birth period, the system converts the date and runs it through a fixed set of placement rules, and the result is a square grid of twelve palaces populated with named stars.

The name translates literally as the "calculation of the Purple Star in the Dipper." 紫微 (Zi Wei) is the Emperor Star, the pivot around which the rest of the chart is arranged; once its position is fixed, the remaining thirteen major stars follow by fixed formulas. 斗 (Dou) refers to the constellation field, and 数 (Shu) means counting or calculation.

Where BaZi reads a life through the balance of the five elements and the Ten Gods, Zi Wei Dou Shu separates life into twelve distinct domains and reads each one on its own. That granularity is why it is often used for questions about specific areas — a career decision, a relationship pattern, a period of financial strain — rather than general character alone.

How a chart is calculated

A Zi Wei Dou Shu chart requires four inputs, and one of them matters far more than the others:

The calculation proceeds in a fixed order. The lunar birth month and hour locate the Life Palace. The birth year's stem and branch assign the Five Element Bureau (五行局) — the elemental frame that governs where Zi Wei itself is placed. With the Emperor Star placed, the other thirteen major stars fall into position by fixed rules, and the auxiliary stars are distributed on top.

The twelve palaces

The chart is a ring of twelve palaces, each sitting on one of the twelve earthly branches. Together they divide a life into twelve domains. The Life Palace is found first, and the remaining eleven follow it in fixed order.

The fourteen major stars

The fourteen major stars form the skeleton of the chart. They are not "good stars" and "bad stars" — they are fourteen different directions of energy, each with a side it handles well and a side that needs attention.

These are single-star tendencies, not conclusions. The same star in a different palace, combined with different companion stars, and then overlaid with transformations, reads very differently. A complete reading is the product of three layers: palace + star combination + transformations.

The Four Transformations (Si Hua)

The Four Transformations — 四化, Si Hua — are the most important dynamic markers in Zi Wei Dou Shu. There are four of them, and a birth year's heavenly stem determines which star each transformation attaches to:

• Lu (化禄) — the smooth, flowing side of a star's energy: resources, opportunity, the direction you willingly invest in.
• Quan (化权) — the intensified side: control, drive, responsibility, the will to push something forward.
• Ke (化科) — the visible side: reputation, order, recognition that arrives from outside.
• Ji (化忌) — the contracting side: attachment, a recurring lesson, the area that demands attention. Ji does not mean misfortune. It more often marks the subject a person invests the most in.

Transformations give a static chart its dynamics: the same star reads completely differently with and without a transformation attached. The usual order of reading is therefore transformations first to set the tone, then the star combinations and the palaces they land in.

The ten-stem Four Transformations table

The transformations fall into ten groups, one per heavenly stem. The table below is the version this site uses consistently across all charts and readings:

Transformations come from three sources, and they answer different questions: birth-year transformations are taken from the birth year's stem and never change — they describe the standing pattern of a life. Life-Palace stem transformations are cast from the stem of the Life Palace itself and reflect the person's own subjective behaviour. Palace-to-palace transformations are cast from any palace's stem and show the direction in which that domain moves.

How a chart is read

A reading proceeds from structure to detail, and the order matters:

Natal, decadal and annual timing

Zi Wei Dou Shu reads time in three nested layers. The natal chart (本命) describes the standing pattern of a life and never changes. The decadal cycle (大限) divides life into ten-year periods, each governed by one palace, setting the framework for that decade. The annual cycle (流年) narrows the same logic to a single year and marks where a specific period's pressure or opportunity lands.

The three layers relate as frame, structure and trigger — the natal chart gives the baseline, the decade defines the framework, and the year pinpoints the moment. Two disciplines apply when using them: the three layers' transformations are never mixed with one another, and a reading's output is kept at the level of the month rather than the exact day.

Frequently asked questions