A reading guide
The Zhouyi (Changes of Zhou) is the early text at the heart of the Yijing (Book of Changes). Its 64 hexagrams join a compact system of line symbols to statements about changing situations. Later commentaries widened its use from divination to reflection on nature, conduct, and decision making.
This page introduces the text and its reception. Historical claims, traditional attributions, and later reading methods are identified separately.
01 · The work
What is the Zhouyi?
In a narrower sense, Zhouyi refers to the early hexagram and line material: a name for each hexagram, a statement about the whole, and statements associated with its lines. In the commonly received Yijing, this material is read alongside later commentaries called the Yizhuan or “Ten Wings.” Editions and discussions may therefore use the names Zhouyi and Yijing somewhat differently. [1, 2]
The work is neither a single author's treatise nor a single, fixed theory. Its early layers preserve concrete images and judgments; later readers found in them questions about timing, relationships, uncertainty, and responsible action. The distinction between the older text and its later interpretations helps make sense of its many uses. [1, 3]
02 · Formation
Origins, tradition, and historical study
Traditional accounts credit Fuxi with the trigrams, King Wen with arranging or explaining the hexagrams, the Duke of Zhou with the line statements, and Confucius with the commentaries. These are important parts of the work's cultural memory; they are not a secure list of individually verified authors. Scholarship treats the received book as a layered text, with early Zhou divination material and later commentarial writings developed over centuries. [1, 3]
The early hexagram and line statements became a classic. The commentarial writings were assembled later and grouped as the Ten Wings, giving the received text an especially strong philosophical voice. Its history is therefore both the history of an early text and the history of people continually reading and reinterpreting it. [1, 2]
03 · Visual language
From yin and yang lines to 64 hexagrams
An unbroken line (⚊) is conventionally called yang; a broken line (⚋) is called yin. Three lines, counted from the bottom up, form a trigram (gua). Two trigrams stacked together form a six-line hexagram. Eight possible trigrams can be paired in 8 × 8 ways, producing 64 hexagrams and 384 line positions. A line's position and its relation to the other lines matter alongside the hexagram's name. [2, 4]
| Symbol | Trigram | Traditional image | Symbol | Trigram | Traditional image |
|---|---|---|---|---|---|
| ☰ | 乾 Qian | Heaven | ☷ | 坤 Kun | Earth |
| ☳ | 震 Zhen | Thunder | ☴ | 巽 Xun | Wind |
| ☵ | 坎 Kan | Water | ☲ | 離 Li | Fire |
| ☶ | 艮 Gen | Mountain | ☱ | 兌 Dui | Lake |
These are traditional symbolic associations, not claims that a trigram is physically made of its image. Trigram and hexagram lines are read from bottom to top. [4]
04 · Textual layers
What does a hexagram contain?
The classic (jing)
A hexagram has a name identifying a situation or image. The hexagram statement (guaci) speaks about the whole. The line statements (yaoci) describe individual positions or changes. For example, ䷀ Qian consists of six unbroken lines, while ䷁ Kun consists of six broken lines. They open the received sequence. [2, 4]
The commentaries (zhuan)
The “Ten Wings” are later explanatory writings. They include the Tuan and Xiang commentaries, the Xici (“Great Treatise”), and the Shuogua (discussion of trigrams), among others. Some works are divided into upper and lower parts, hence the conventional count of ten. They connect images and statements with broader ethical and cosmological interpretations. [1, 4]
05 · A way in
How to read a hexagram
- Start with the question and context. Record what happened and what you want to examine. A hexagram is more useful when read against a concrete situation than as a free-floating label.
- Identify the six lines. Count from the bottom line to the top. Read the lower and upper trigrams, then the full hexagram's name and statement.
- Read relevant line statements. In divinatory traditions, selected “moving” lines draw attention to particular positions; changing them yields a second hexagram. The selection and interpretation rules differ between schools.
- Compare interpretations with the text. Note which claims come from the early statements, which from the Ten Wings, and which from later methods. Return to the actual events rather than treating an interpretation as a guaranteed outcome.
The site's Liuyao coin-casting method is a later divinatory practice drawing on hexagram symbols. Its additional systems are not identical to the wording of the early Zhouyi.
06 · Reception
How later readers understood change
Han readers developed elaborate correlations among hexagrams, time, and the natural world. Wang Bi emphasized the principle or meaning behind images. Zhu Xi, while distinguishing classic from commentary, argued that divination was important to the book's original purpose. These are influential readings rather than one timeless consensus. [1]
Across these approaches, “change” invites attention to relationships, timing, and the limits of foresight. The book has shaped Chinese intellectual history as a classic of symbols and commentary. Its cultural significance does not establish that a reading can scientifically predict a person's future. [1, 3]
07 · Clarifications
Common questions
- Did one person write the Zhouyi?
- Traditional attributions name several culture heroes and sages. The received work has distinct historical layers; assigning every part to one verified author would be misleading.
- Is the Yijing only a divination manual?
- The early statements have a divinatory setting. Later commentaries and centuries of reading also made it a philosophical and ethical classic.
- Is today's Liuyao practice the original Zhouyi?
- It uses hexagrams and lines from the broader Yi tradition, but adds later interpretive techniques. It is one way of engaging with the symbols, not the whole history of the text.
- Do yin and yang mean “good” and “bad”?
- No. They mark two kinds of line and support relational, context-dependent readings; neither line is automatically favorable.
Continue exploring
Try the ideas in this app
The casting methods and traditional interpretations are explained on their respective pages.
Further reading
Sources and scope
This is an original introduction based on the references below; it does not reproduce the Baidu article. The encyclopedia is included as the reader-supplied starting point. The academic and library sources support the distinctions between early text, later commentaries, traditional attribution, and historical study.