Zi Wei Dou Shu, in plain language
Draw your twelve-palace chart for free, then read what it says in words you can actually use.
What Zi Wei Dou Shu is
Zi Wei Dou Shu (Purple Star Astrology) is a traditional Chinese method of mapping a life chart from the date and hour of birth. It places twelve palaces and a set of stars into a fixed layout. This site is a reference tool: it lays the chart out by the traditional rules so you can study it. It does not predict events.
Calculation stays in your browser
Birth details are processed on your device. Nothing is uploaded unless you choose to save a chart.
No predictions
This is a reference tool for traditional culture. We describe tendencies and what to watch, not what will happen.
Free reading, paid depth
The chart and the structured reading are free. An AI deep reading is a paid content service.
Tools on this site
Zi Wei Dou Shu chart
Twelve palaces, major stars, four transformations and decade stages — drawn in your browser.
Liu Yao
Cast a hexagram by shaking lines or by time, and read the six lines in plain language.
Knowledge base
Notes on the fourteen major stars, the twelve palaces and the four transformations.
Why the calculation stays in your browser
A chart needs a birth date and hour. Once that leaves your device it exists somewhere else. The chart engine (iztro, MIT licence) is bundled with this site, so the whole calculation runs locally. The server only records page views and an anonymous counter — it does not receive your birth details.