TL;DR: The Eight Palaces divide the 64 hexagrams of the I Ching into eight groups, each beginning from a pure hexagram and generating the other seven by changing lines in a fixed order. Within each hexagram, the Ruling and Responding lines are placed according to its position in the palace: the pure hexagram has its Ruling line at the sixth line, the First Generation at the first line, then the second, third, fourth, fifth, the Wandering Soul at the fourth line, and the Returning Soul at the third line; the Responding line is always three positions away from the Ruling line. This is a convention of the Jing Fang and Liu Yao schools, not a direct teaching of the classic text.
What are the Eight Palaces and the Ruling line?
The Eight Palaces is a way of dividing the 64 hexagrams of the I Ching into eight groups, each called a palace, headed by a pure hexagram (one whose two trigrams are identical). The Ruling line is the line position chosen to represent the querent, while the Responding line is the opposite position, representing the other party, the matter, or the situation being asked about. The pair of Ruling and Responding lines only has meaning within the Liu Yao system, which assigns heavenly stems and earthly branches, the six relations, and the six spirits to each line for interpretation.
A clear distinction is needed: the ancient classic contains only hexagram statements and line statements, with no concept of a Ruling line or Responding line. The entire method of placing the Ruling line, placing the Responding line, dividing palaces, and assigning the five phases to lines belongs to the later layer of commentary and application. Tradition usually attributes this system to Jing Fang of the Han dynasty, and later Liu Yao books such as *Bốc Phệ Chính Tông* and *Tăng San Bốc Dịch* inherited and systematized it. This is a tradition attributing authorship, not an event proven by contemporary documents.
Why divide the 64 hexagrams into eight palaces?
The purpose of dividing into palaces is to create a regular order of transformation, so that from a single pure hexagram one can derive its seven sibling hexagrams. Thanks to this order, a student can quickly look up which palace a hexagram belongs to, which line is the Ruling line, which is the Responding line, and which line is moving, without needing a pre-made table for all 64 hexagrams.
This division also reflects a view of the Liu Yao system: each hexagram does not stand alone but belongs to a family, with an original hexagram and variant hexagrams. In interpretation, one considers both the primary hexagram and the changed hexagram, and sometimes also the palace to which the hexagram belongs in order to infer the five phases of the trigram body, that is, the five phases of the whole palace.
The rules of palace division and placement of the Ruling and Responding lines below are conventions of the Liu Yao school, systematized by Jing Fang and recorded by later Liu Yao books. Other schools of I Ching study, such as the Meaning and Principle school of Wang Bi, Cheng Yi, or Zhu Xi, do not use the concepts of Ruling line and Responding line in this sense, so the table below should not be applied to every way of reading the I Ching.
How are the Ruling lines placed across the eight positions in a palace?
Within each palace, the eight hexagrams are arranged in a fixed order, and each position has its own way of placing the Ruling and Responding lines. The first hexagram is the pure hexagram, with the Ruling line at the sixth line (the top line); the second is the First Generation, with the Ruling line at the first line (the bottom line); the third is the Second Generation, with the Ruling line at the second line; the fourth is the Third Generation, with the Ruling line at the third line; the fifth is the Fourth Generation, with the Ruling line at the fourth line; the sixth is the Fifth Generation, with the Ruling line at the fifth line; the seventh is the Wandering Soul, with the Ruling line at the fourth line; the eighth is the Returning Soul, with the Ruling line at the third line.
The Responding line is always exactly three positions away from the Ruling line, by the principle of symmetry within the same layer: the first line responds to the fourth line (earth layer), the second line to the fifth line (human layer), the third line to the sixth line (heaven layer). If the Ruling line is at the fourth line, the Responding line is at the first line; if the Ruling line is at the fifth line, the Responding line is at the second line; if the Ruling line is at the sixth line, the Responding line is at the third line.
The table below summarizes the eight positions in a palace, the placement of the Ruling and Responding lines, and the line flipped to generate the next hexagram:
| Position | Name | Ruling line | Responding line | Line flipped relative to previous hexagram |
|---|---|---|---|---|
| 1 | Pure hexagram | 6 | 3 | none, it is the original hexagram |
| 2 | First Generation | 1 | 4 | flip line 1 of the pure hexagram |
| 3 | Second Generation | 2 | 5 | flip line 2 of the pure hexagram |
| 4 | Third Generation | 3 | 6 | flip line 3 of the pure hexagram |
| 5 | Fourth Generation | 4 | 1 | flip line 4 of the pure hexagram |
| 6 | Fifth Generation | 5 | 2 | flip line 5 of the pure hexagram |
| 7 | Wandering Soul | 4 | 1 | flip line 4 of the Fifth Generation hexagram |
| 8 | Returning Soul | 3 | 6 | flip the entire inner trigram, returning the inner trigram to the palace trigram |
One easily confused point: the flipped-line column for the Wandering Soul and Returning Soul rows is no longer counted from the pure hexagram but from the preceding hexagram. The Wandering Soul takes from the Fifth Generation and flips line 4. The Returning Soul takes from the Wandering Soul and flips all three lines of the inner trigram, causing the inner trigram to return to the original trigram of the palace. This is precisely why it is called Returning Soul, meaning to return.
A full example: the eight hexagrams of the Li palace
To see the mechanism clearly, take the Li palace as an example. The pure hexagram is Li Wei Huo. From here, lines are flipped in turn to generate the remaining seven hexagrams:
- Pure hexagram: Li Wei Huo, Ruling line at line 6, Responding line at line 3.
- First Generation: Huo Shan Lü, Ruling line at line 1, Responding line at line 4.
- Second Generation: Huo Feng Ding, Ruling line at line 2, Responding line at line 5.
- Third Generation: Huo Shui Wei Ji, Ruling line at line 3, Responding line at line 6.
- Fourth Generation: Shan Shui Meng, Ruling line at line 4, Responding line at line 1.
- Fifth Generation: Feng Shui Huan, Ruling line at line 5, Responding line at line 2.
- Wandering Soul: Tian Shui Song, Ruling line at line 4, Responding line at line 1.
- Returning Soul: Tian Huo Tong Ren, Ruling line at line 3, Responding line at line 6.
The Returning Soul rule can be cross-checked with this very example: Tian Huo Tong Ren has an inner trigram of Li, exactly the original trigram of the Li palace, so the inner trigram has returned, in the true sense of Returning Soul. Similarly, the Qian palace has the pure hexagram Qian Wei Tian, the Wandering Soul Huo Di Jin, and the Returning Soul Huo Tian Da You; that Returning Soul hexagram has an inner trigram of Qian, returning to the original trigram of the Qian palace.
Another easily confused point: Di Shui Shi is not just any hexagram that happens to become the Returning Soul of the Kan palace. Di Shui Shi is precisely the Returning Soul of the Kan palace according to the proper palace order. The Kan palace consists of: Kan Wei Shui (pure), Shui Ze Jie (First Generation), Shui Lei Zhun (Second Generation), Shui Huo Ji Ji (Third Generation), Ze Huo Ge (Fourth Generation), Lei Huo Feng (Fifth Generation), Di Huo Ming Yi (Wandering Soul), Di Shui Shi (Returning Soul). The inner trigram of Di Shui Shi is Kan, exactly the original trigram of the Kan palace.
Why are the Ruling and Responding lines always three positions apart?
The basis of this distance is the division of the six lines into three layers: lines One and Two belong to the earth layer, lines Three and Four to the human layer, lines Five and Six to the heaven layer. The Ruling and Responding lines are in the same layer, symmetric about the central axis of the hexagram: line One with line Four in the earth layer, line Two with line Five in the human layer, line Three with line Six in the heaven layer.
This layer division is also the basis of the Tầm thế mnemonic in the Liu Yao system, usually recorded in four Chinese sentences: "天同二世天变五，地同四世地变初，本宫六世三世异，人同游魂人变归". The gist: if the two trigrams differ only in the heaven lines (lines Three and Six), the Ruling line is at the Second Generation; if the heaven lines are the same, the Ruling line is at the Fifth Generation; if the two trigrams differ only in the earth lines (lines One and Four), the Ruling line is at the Fourth Generation; if the earth lines are the same, the Ruling line is at the First Generation; if the hexagram belongs to its own palace, the Ruling line is at the sixth line; if all three lines differ, the Ruling line is at the Third Generation; if the two trigrams differ only in the human lines (lines Two and Five), the Ruling line is at the Wandering Soul; if the human lines are the same, the Ruling line is at the Returning Soul.
This mnemonic is a quick lookup tool, allowing a student to look at the upper and lower trigrams to infer the Ruling line position without memorizing the whole table. This lookup matches the table in the previous section and also matches the line-change order presented.
Application of the Ruling and Responding lines in interpretation
In the Liu Yao system, the Ruling line represents the querent, the Responding line represents the opposite side: the person asked about, the matter asked about, or the external situation. In interpretation, one considers the five phases of the Ruling and Responding lines, the generating and controlling relations between them, their strength or weakness according to month and day, and their relations with other lines such as the Useful Spirit, Original Spirit, Enemy Spirit, and Vengeful Spirit.
For example, if the Responding line generates the Ruling line, the opposite side is favorable to the querent; if the Responding line controls the Ruling line, the opposite side is unfavorable; if the Ruling line controls the Responding line, the querent is in an active position. These relations are only one part of the whole method of interpretation and are not sufficient to conclude fortune or misfortune if separated from other factors such as the month builder, day spirit, moving lines, and changed lines.
It must be emphasized that this is the interpretive method of a specific system, not a direct teaching of the classic text. The ancient I Ching does not say the Ruling line is the querent himself, nor that the Responding line is the other party. Such assignments belong to the application layer of the Liu Yao system.
Common points of confusion when learning the Eight Palaces and Ruling lines
Some common confusions:
- Confusing the order of placing the Ruling line, thinking the first hexagram places the Ruling line at the first line and the sixth hexagram at the sixth line. The correct order is the reverse: pure hexagram Ruling line at line Six, First Generation at line One, Second Generation at line Two, Third Generation at line Three, Fourth Generation at line Four, Fifth Generation at line Five, Wandering Soul at line Four, Returning Soul at line Three.
- Confusing the flipped-line column. From First Generation to Fifth Generation, lines One to Five are flipped in turn from the pure hexagram. But the Wandering Soul does not flip line Six; it flips line Four of the Fifth Generation hexagram. The Returning Soul does not flip any single line; it flips the entire inner trigram of the Wandering Soul hexagram so that the inner trigram returns to the original trigram of the palace.
- Confusing the palace of a hexagram. For example, Kun Wei Di is the pure hexagram of the Kun palace, not the Returning Soul of the Li palace. To know which palace a hexagram belongs to, one must check whether the inner trigram of the Returning Soul hexagram in that palace matches the original trigram, or consult the palace division table.
- Confusing the Ruling and Responding lines as being in the same layer by diagonal symmetry. In fact, the Ruling and Responding lines are in the same layer: line One with line Four is the earth layer, line Two with line Five is the human layer, line Three with line Six is the heaven layer.
Gợi ý của Nhật Nguyệt
Gợi ý của Nhật Nguyệt: if you are new to Liu Yao, master the eight-position table before learning interpretation. That table is a lookup tool, not the philosophical content of the I Ching. When encountering a hexagram, the first step is to determine which palace it belongs to and its position in that palace, from which the Ruling and Responding lines are inferred. After the Ruling and Responding lines are determined, then consider the five phases, generating and controlling, strength and weakness, and movement and change.
Also remember that the Tầm thế mnemonic and the palace division table are two different lookup methods for the same result. A student may use whichever is more convenient, as long as it can be cross-checked with the other. When the two methods give different results, almost certainly a step has been mistaken, so stop and check rather than forcing further interpretation.
