BaZi (Four Pillars of Destiny)

The stem and branch count behind the system

BaZi is built on the Chinese sexagenary count. Britannica describes it as a 60-unit cycle formed by pairing 10 celestial stems (gan) with 12 terrestrial branches (zhi), used to count days for more than 3,000 years and probably adopted for counting years by Han dynasty emperors during the 2nd century CE. The same entry notes that animal names, the Chinese zodiac, have long been attached to years and to hours of the day.

The Stanford Encyclopedia of Philosophy adds that the sexagenary cycle of stems and branches figured among the mantic arts of the Han recipe masters (fang shi), who worked within yin-yang and Five Agents (wuxing) cosmology. The encyclopedia does not discuss BaZi, so this describes only the background vocabulary from which later systems drew.

From three pillars to four

One scholar-practitioner account, by Manfred Kubny, describes an earlier system of six characters in three pillars (year, month and day), recorded by Li Xuzhong, whom the account dates to about 806 to 820 CE and links to a surviving Tang-period work called Li Xuzhong Mingshu (Book of Fate). In that earlier scheme the person was represented by the stem of the year, not the day. The account also mentions an older technique called luming, said to date from the first century CE, whose literature is lost.

The same account credits Xu Ziping, dated to about 908 to 960, as the figure who completed the eight-character system and shifted the representative of the self to the stem of the day. His own book is described as lost but preserved within the later compilation Yuanhai Ziping (The Deep Ocean by Ziping), attributed to an unrelated Xu Dasheng in the 12th century. Other accounts place Xu Ziping in the Song dynasty, and the sources reviewed here give only this one dated account and no peer-reviewed history, so the dates and attributions remain provisional.

Later classics and household use

Kubny names the Qing-period Di Tian Sui, attributed to Ren Tieqiao (1773 to 1840, with a question over the end date in the source), as one of the best known BaZi books. The sources reviewed do not describe the Ming-period literature, so this page does not.

A museum record from Singapore shows the system in family life in the early twentieth century. The National Museum of Singapore holds a set of Eight Characters charts made for a couple in 1922 and for the first-month birthdays of three of their children in 1928, 1930 and 1931.

Names for the system

Bazi (eight characters) names the four pairs of characters recorded for a birth year, month, day and hour. Four Pillars of Destiny is an English rendering that counts the pairs as pillars. Kubny uses the term Bazi Suanming, the life calculation of the eight characters, and calls the set of eight characters the basic disposition (ming). The Singapore museum record uses the form Eight Characters fortune chart for the written chart itself.

Siju mingli, a name given for the system in some descriptions, was not found in the sources opened for this page and is listed as an alias on the basis of the editorial brief only. Editors should confirm the name against a scholarly source before it is treated as established terminology.

Neighboring terms

The Chinese zodiac is a separate and simpler classification. Britannica describes it as an annual system in which each year of a 12-year cycle is assigned an animal, with each animal associated with a personality said to typify people born in that year. BaZi, by contrast, is described as using pairs for the year, month, day and hour of birth, so the zodiac animal corresponds only to the branch of the year.

Wuxing is rendered Five Agents in the Stanford Encyclopedia of Philosophy and Britannica lists the elements as earth, wood, metal, fire and water. Both usages appear on this page, with phases or agents used for the same Chinese term in different English-language sources. Other Machipedia pages, including I Ching (Yijing), Feng Shui, Face Reading, Numerology and Astrology, cover related but distinct practices.

What a chart records

The Singapore museum record describes a typical chart as written on red rice paper and as containing the Eight Characters of the person concerned: four pairs of characters giving the year, month, day and hour of birth, together with their combination of the five elements, namely metal, wood, water, fire and earth.

Kubny describes the system as having several layers. The basic disposition is taken from a Chinese calendar of stem and branch data and is held to be fixed at birth. A great lifecycle is made of consecutive ten-year periods, called pulses, and the flowing years are calendar years. Practitioners also use twelve life palaces, an arrangement of life areas such as parents, children, spouse and profession. This page does not explain how a chart is constructed or read.

Consultation and training

The same source distinguishes the analysis of a chart from consultation with a client and says that both involve theories and rules and require intensive training. It is a practitioner-authored statement, and the sources reviewed contain no register, curriculum or qualification standard for BaZi practitioners, and no statutory or professional regulation was found.

Matchmaking and the future of a child

The National Museum of Singapore record states that charts of this kind are used in Chinese tradition for foretelling the future of a one-month-old child and for matchmaking. The record is a description of objects from a single family and does not measure how widespread the practice is in any region.

Personality, lifespan and wider claims

Kubny states that the system is used to describe a human personality and its lifespan. His closing note refers to applications for self-understanding, health, healing and destiny. These are claims by a practitioner of the system and have not been tested in the sources reviewed here.

The Stanford Encyclopedia of Philosophy places yin-yang and Five Agents theories within Chinese medical theory and records them alongside divination in the Han bibliographic treatise. How BaZi relates to Traditional Chinese Medicine in present-day practice is not covered by the sources reviewed, and nothing here should be read as a link between the two.

Searches run and what was found

No controlled study, systematic review or other test of whether BaZi charts predict personality, marriage outcomes, health or other results was found. A PubMed search combining Four Pillars of Destiny, BaZi and Eight Characters with Chinese fortune telling and birth returned no records on 2026-10-19, and web searches for open statistical studies of BaZi claims did not locate any. The absence of studies is not evidence either way about the practice.

Research on astrology in general

Studies of Western astrology offer context but do not test BaZi. In a double-blind study of 52 college students, participants asked to pick their true personality summary from a computer-generated natal chart and a bogus one were unable to identify the real chart summary, while the same students identified their real personality inventory profile at better than chance. The authors observed a Barnum effect in the accuracy ratings of both kinds of summary.

A scoping review of research on belief in astrology and fortune-telling reports associations between such belief and thinking style, self-concept verification and stress. It describes a small number of case studies of what authors call fortune-telling addiction and states that further research is needed. The review concerns astrology and fortune-telling in general and does not single out BaZi.

Reliance on readings

The sources reviewed contain no data on harms from relying on BaZi readings for health, marriage or business decisions. The scoping review of astrology and fortune-telling describes a risk of adverse mental health consequences in a few instances of excessive engagement, and the reviewers state that more research is needed. Readings are not a substitute for medical, legal or financial advice, and decisions about care should not be delayed or replaced on the strength of a reading.

Cost, fraud and practitioner standards

Open, non-legal sources on the cost of BaZi consultations or on fraud in the field were not found, so this page makes no statement on either. Training is described by a practitioner as requiring intensive study, and no professional register, code of ethics or protected title for BaZi practitioners was identified in the sources reviewed.