Glossary · terms with context attached
A pinyin label alone is not an explanation. Each entry keeps the characters, preferred English, alternate names, cultural context, common misunderstanding, and sources together.
How to use this page
The first line gives the Chinese characters and preferred English. Open “Context and boundary” for the cultural frame, the common misunderstanding, related terms, and source links.
Spelling varies across translations. Alternate names are listed for search and recognition, while the preferred form stays consistent across the site.
Glossary group
The year, month, day, and hour represented as four pairs of Heavenly Stems and Earthly Branches.
Read the full Four Pillars explanation →
Also: BaZi · Bazi · Eight Characters
Also called BaZi, meaning “eight characters” because each pair contains two characters.
What it does not mean. The four pillars are not four predictions. They are four coordinates for a symbolic reading system.
The day stem, used in traditional Four Pillars reading as the reference point for the other characters.
Read the full Day Master explanation →
Also: Day Stem · Rì Zhǔ
It describes a position in a symbolic structure. A reader may then discuss how the other stems, branches, and seasonal conditions relate to that position.
What it does not mean. It is not a scientific personality type, an IQ score, or a fixed prediction of character.
Wood, Fire, Earth, Metal, and Water: a relational model of transformation and restraint.
Read the full Five Phases explanation →
Also: Five Elements · Wu Xing · Wǔ Xíng
The English phrase “Five Elements” is common, but “Five Phases” better conveys movement and relationship rather than five fixed substances.
What it does not mean. A visible count is not a strength diagnosis, and a “missing” phase is not automatically something to add.
A cycle of ten labels used with Earthly Branches to name positions in the traditional sexagenary calendar.
Read the full Heavenly Stems explanation →
Also: Stems · Tiangan · Ten Stems
Each Four Pillars position pairs one Heavenly Stem with one Earthly Branch. Stems also carry polarity and Five Phase associations.
What it does not mean. A stem is not a chemical element or a standalone personality result; its role depends on the position and method.
A cycle of twelve labels paired with Heavenly Stems in the sexagenary calendar and associated with zodiac animals.
Read the full Earthly Branches explanation →
Also: Branches · Dizhi · Twelve Branches
The year branch supplies the popular zodiac animal, while the hour branch helps represent the two-hour birth-time interval.
What it does not mean. The branch is not an animal personality type, and the zodiac boundary must follow the stated calendar convention.
An animal associated with the year in the Chinese sexagenary cycle.
Read the full Chinese zodiac animal explanation →
Also: Shengxiao · Chinese zodiac
Popular culture often treats the animal as a sun-sign-like personality label. In this project it is a calendar-linked cultural symbol.
What it does not mean. It is not a complete personality reading, and the popular Lunar New Year boundary may differ from the Four Pillars year boundary.
Glossary group
A traditional lunisolar calendar whose months follow lunar phases and whose year is adjusted with leap months.
Read the full Chinese calendar explanation →
Also: Agricultural calendar · Lunar calendar · Nongli
The system also uses solar terms and sexagenary cycles. Four Pillars calculations can use calendar boundaries that differ from the popular Lunar New Year boundary.
What it does not mean. Calling it a “lunar calendar” is convenient but incomplete because solar terms and leap-month rules also shape the year.
One of the twenty-four solar terms; it marks the beginning of spring in the traditional solar calendar.
Read the full Beginning of Spring explanation →
Also: Start of Spring · Lichun
In many Four Pillars conventions, the year pillar changes at the astronomical instant of Lichun, not on January 1 or necessarily on Lunar New Year.
What it does not mean. A fixed February 4 date is not precise enough for boundary cases; the actual solar-term instant matters.
Twenty-four seasonal markers based on the sun’s apparent position in the year.
Read the full solar terms explanation →
Also: Jieqi · 24 solar terms
Chinese solar terms are not simply months. They are astronomical turning points used in calendars, agriculture, festivals, and traditional systems.
What it does not mean. A solar-term name is not always a holiday; nor does every term mark the same kind of boundary in every system.
The spring solar term when day and night are approximately equal in the Northern Hemisphere.
Read the full Spring Equinox explanation →
Also: Chunfen
It is one of the twenty-four solar terms. In English, “Spring Equinox” is more informative than the pinyin alone.
What it does not mean. It is not the only beginning of spring; Lichun is the conventional beginning of spring in the solar-term sequence.
The two-hour period around midnight, from 23:00 to 01:00.
Read the full Zi hour explanation →
Also: Late Zi hour · Zǐ hour
Traditions differ over whether the day pillar changes at 23:00 or at civil midnight. The difference matters for births inside this interval.
What it does not mean. There is no single globally undisputed rule; the convention must be stated.
Glossary group
An ancient Chinese classic centered on change, pattern, and symbolic hexagrams.
Read the full Book of Changes explanation →
Also: I Ching · Yijing · Zhouyi
It can be read as a divination text, a philosophical text, or a historical and literary object. Those are different approaches.
What it does not mean. It is not a single fixed fortune-telling algorithm, and translations differ substantially.
A traditional Chinese method that derives a six-line hexagram structure from numbers, time, objects, sounds, or observed events.
Also: Meihua · Plum Blossom Numerology · Plum Blossom Yi Shu
The method is traditionally associated with the Song-dynasty figure Shao Yong. This calculator implements only the explicit time and two-number conventions, and shows each arithmetic step.
What it does not mean. It is not a yes/no oracle. A traditional attribution also does not settle historical authorship or every later interpretation.
Eight three-line figures made from solid and broken lines, each with a name, image, direction, and phase association.
Also: Bagua · Eight Gua
Meihua casting combines two trigrams into a six-line hexagram. The calculator uses the number order Qian 1 through Kun 8 and identifies each result in Chinese, pinyin, and English.
What it does not mean. The trigrams are not eight personality categories or eight fixed answers. Their meaning depends on the structure being examined and the convention used.
The six-line hexagram formed directly from the two cast trigrams before the moving line changes.
Also: Original hexagram · Primary gua
In Meihua notation, the primary hexagram is the starting structure. The moving line then generates a changed hexagram, while the middle four lines form a nuclear hexagram.
What it does not mean. It is not a fixed destiny or a standalone answer. It is one position in a sequence of derived structures.
A secondary hexagram built from the middle four lines of the primary hexagram.
Also: Mutual hexagram · Nuclear gua
Lines 2–4 form the lower nuclear trigram and lines 3–5 form the upper nuclear trigram. It highlights an internal pattern already present in the primary structure.
What it does not mean. It is not an independent second cast or a hidden prediction. Some traditions discuss a special treatment for Qian and Kun; this calculator uses the general line-derived rule and discloses that choice.
The hexagram produced when the selected moving line reverses from solid to broken, or broken to solid.
Also: Transformed hexagram · Changed gua
The change makes movement visible in the line structure. The page shows the exact line that changed so the derivation can be checked.
What it does not mean. It does not forecast a future event. “Changed” describes the transformed symbol, not a promised outcome.
One of the six lines, selected by the cast arithmetic, whose polarity changes in the derived hexagram.
Also: Changing line · Dong yao
Lines are counted from the bottom. In this project, the moving line also determines which trigram is treated as Body and which as Use.
What it does not mean. It is not a command or a direct answer. It marks a position of change inside the calculated structure.
A pair of roles used to relate the trigram containing the moving line to the other trigram.
Also: Ti Yong · Ti-Yong
The Body trigram is treated as the reference position and the Use trigram as the responding position. Their Five Phases are compared through generating and controlling relations.
What it does not mean. Body and Use are not “self versus enemy,” good versus bad, or a hidden verdict. They are a relational convention for reading the structure.
Glossary group
A classical Chinese term with a wide range of meanings, including a path, method, order, or the way something unfolds.
Also: Tao · Way · Dào
In the Dao De Jing, the term is discussed through paradox and image rather than a single definition. “Way” is a useful provisional translation, not a complete equivalence.
What it does not mean. It is not simply a personal god, a universal energy, or a scientific force. Those are later interpretations or comparisons that require their own evidence.
A classical term often glossed as non-action, but better approached as action without coercion or unnecessary forcing.
Also: Wuwei · Non-action · Non-coercive action
A well-known line in Dao De Jing chapter 37 sets up the paradox 道常無為而無不為: the Dao acts without forcing, yet nothing is left undone. Readings differ across texts and traditions.
What it does not mean. It is not laziness, fatalism, a promise of harmony, or invisible manipulation. It does not remove responsibility or replace professional advice.
A classical term often rendered as self-so, spontaneity, or a quality of being as it is.
Also: Self-so · Spontaneity · Zì Rán
It can describe a non-forced quality of arising in classical texts. Modern Chinese 自然 also means “nature”; that later usage should not be projected backward without qualification.
What it does not mean. It does not mean following every impulse, and it is not identical to the modern English category of nature.
A famous line from the Dao De Jing that uses return, reversal, and cyclical movement as a way to think about change.
Also: Fan zhe dao zhi dong · Return is the movement of the Way
For Western readers, a useful first analogy is a turning point: a process can change direction when it reaches an extreme. The line invites reflection on cycles and limits, not a promise that every bad situation will automatically improve.
What it does not mean. It is not a promise of good luck, a law of karma, or a rule that opposites simply flip.
Calendar index
The solar terms are astronomical seasonal markers. This index keeps all 24 names visible; their exact instants are calculated by the portrait rather than fixed to calendar dates.