1. Lian Shan Xia Dynasty
☶ Led by [Gen] (Mountain). Reflects tribal reverence for mountains.
2. Gui Zang Shang Dynasty
☷ Led by [Kun] (Earth). Symbolizes all things returning to the earth.
3. Zhou Yi Zhou Dynasty
☰ Led by [Qian] (Heaven). The only completely surviving text today.
Why were there three historical evolutions: 'Lianshan', 'Guicang', and 'Zhouyi'? This is actually a microcosm of human societal and anthropological development. During the Xia Dynasty, early humans relied mainly on hunting and gathering, holding deep awe for towering mountains, hence prioritizing the 'Gen Hexagram' (representing mountains). By the Shang Dynasty, agriculture matured and matriarchal influence remained; all life depended on the earth, so the 'Kun Hexagram' (representing earth) was revered. It wasn't until the Zhou Dynasty, with the establishment of a patriarchal society and the awakening of humanism and the feudal system, that the ancients began to 'revere Heaven and follow ancestors', thus prioritizing the 'Qian Hexagram' (representing Heaven). This is not just a succession of divination books, but a massive leap in human civilizational cognition.
Legend says King Wen wrote the Hexagram judgments, and the Duke of Zhou wrote the line statements. Later, Confucian scholars wrote the "Ten Wings" (including Shuo Gua) to explain the profound texts.
A Hexagram is built from bottom to top, divided into the "Three Realms":
• Lines 6 & 5 (Heaven): Yin and Yang
• Lines 4 & 3 (Humanity): Benevolence and Righteousness
• Lines 2 & 1 (Earth): Hardness and Softness
Represents the primordial universe—a state of absolute, opposing balance. It lacks a time sequence and focuses purely on "spatial symmetry." (Note: Traditional Chinese maps place South at the top).
Contains a definitive directional and temporal sequence, representing the life, flow, and death of all things on Earth. This is the absolute foundation for modern Feng Shui and Bazi.
Core Rule: Yang trigrams contain more Yin lines; Yin trigrams contain more Yang lines.
| Category | Yang Trigrams (陽卦) | Yin Trigrams (陰卦) | ||||||
|---|---|---|---|---|---|---|---|---|
| 乾 ☰ | 震 ☳ | 坎 ☵ | 艮 ☶ | 坤 ☷ | 巽 ☴ | 離 ☲ | 兌 ☱ | |
| Element | Metal | Wood | Water | Earth | Earth | Wood | Fire | Metal |
| Nature | Strong | Moving | Sinking | Stopping | Yielding | Penetrating | Clinging | Joyful |
| Family | Father | Eldest Son | Middle Son | Young Son | Mother | Eldest Dtr | Middle Dtr | Young Dtr |
| Body | Head | Feet | Ears | Hands | Belly | Thighs | Eyes | Mouth |
| Animal | Horse | Dragon | Pig | Dog | Ox | Chicken | Pheasant | Sheep |
When studying the Bagua matrix above, readers with a science background will notice a striking overlap between this system and modern computer science. In fact, the I Ching is the earliest 'Binary System' in human history. If we view the Yin line as 0 and the Yang line as 1, the Bagua consisting of three lines perfectly corresponds to a 3-bit system in computer science (2³ = 8 states); while the 64 Hexagrams are 6-bit (2⁶ = 64 states). Leibniz, the famous 17th-century mathematician and inventor of calculus and the binary system, was incredibly astounded upon seeing the 64 Hexagram diagram of the I Ching, marveling that the ancient Easterners had established this rigorous algebraic system over two millennia ago.
You might ask: 'This is a BaZi destiny system, so why are we dedicating space to studying the I Ching's Bagua?' Because the Bagua is the underlying code for all Eastern occult sciences and Traditional Chinese Medicine (TCM). In practical BaZi applications, we often perform matrix mapping between the Heavenly Stems/Earthly Branches and the 'body parts' in the table above. For example, the 'Qian Hexagram' and 'Dui Hexagram' in the Bagua belong to Metal; Qian represents the head, and Dui represents the lungs and respiratory tract. If the 'Geng and Xin' (representing Metal) in your BaZi chart are severely clashed or drained (e.g., strong Fire melting Metal), it becomes highly likely to predict diseases of the cranial nerves or respiratory system. This logic of combining Yi (I Ching principles) with pathology is called 'Medical-Yi Homology' in TCM. By understanding this table, you obtain the universal API to unlock the codes of the human body and destiny.