Free online tool

Qi Zheng Si Yu — Chinese astrology by real planetary positions

The seven luminaries and the four shadow planets placed by actual astronomical position at your birth, with the ascendant, life and body rulers, and annual timing.

Qi Zheng Si Yu — Chinese astrology by real planetary positions

Seven luminaries, four shadows

GroupMembersCharacter
Qi Zheng
seven luminaries
Sun, Moon, Jupiter, Mars, Saturn, Venus, MercuryVisible bodies, moving at different speeds
Si Yu
four shadows
Rahu, Ketu, Zi Qi, Yue BoComputed points, not luminous; slow-moving, so they set the theme of a long period

Rahu and Ketu are the two lunar nodes — the points where the Moon’s orbit crosses the ecliptic, which is exactly where eclipses happen. That is why a tradition without telescopes still tracked them.

Why this system is stricter about your birth data

Stricter than Zi Wei, and the reason is the ascendant:

  • Birth time to the minute matters. The ascendant moves by degree, so half an hour can push it into the next sign. Zi Wei uses two-hour periods and tolerates far more.
  • Birthplace is required. The ascendant depends on latitude and longitude — the same clock time in two provinces can give different results.

If you only know an approximate hour, cast a few nearby times and check each against events already in your life.

Read more

Related tools: Zi Wei Dou Shu · BaZi · I Ching · Chinese almanac · Feng shui · Qi Men Dun Jia · Name analysis · Wedding date · Building year · Feng shui ruler · Da Liu Ren

Frequently asked questions

How does this differ from Zi Wei Dou Shu?
In what the “stars” are. Zi Wei places virtual stars by formula from the birth data. Qi Zheng Si Yu uses the real positions of the Sun, Moon and five planets. Zi Wei is stronger at mapping life areas; Qi Zheng Si Yu is stronger at timing and at how bright or weak a body is.
Is it the same as Western astrology?
They share the observed sky and the idea of an ascendant, but the frameworks differ: Qi Zheng Si Yu uses the 28 lunar mansions, the four shadow planets and Chinese rulership rules that have no Western equivalent.
Why do I need to enter a birthplace?
Because the ascendant is computed from the horizon at your location. Without coordinates there is no ascendant, and the life and body rulers have nothing to stand on.
What are Zi Qi and Yue Bo?
Two computed points on long cycles, used with Rahu and Ketu as the four shadow planets. Because they move slowly, they are read as the theme of an extended period rather than a passing influence.
Ask someone who knows

Experts of the Academy

Finished the chart and still unsure about something? Book directly with an expert of the Academy — Qi Zheng Si Yu and other systems. Consultations are currently held in Vietnamese. Consultations are currently held in Vietnamese.

Chang Đất

Chang Đất

Lecturer - Zi Wei Dou Shu Research and Consulting Expert
5.0(1)
Zi Wei Dou ShuTarotPythagorean Numerology
Sơn Chu

Sơn Chu

Founder & Chairman of SonChu Academy
No reviews yet
Feng ShuiI ChingZi Wei Dou Shu
Vũ Trọng Nhân

Vũ Trọng Nhân

Consultant
No reviews yet
Physiognomy – Facial Physiognomy - Divination - Liu Yao - Zi Wei Dou Shu (Southern school)
P

Phùng Đức Thắng

Zi Wei Dou Shu Researcher and Consultant
No reviews yet
Zi Wei Dou ShuTarot
Want to study Qi Zheng Si Yu properly, or need someone to read for you? Leave your name and phone number — no need to pick a course or a teacher. The Academy will get back to you. (Lessons and consultations are in Vietnamese.)