TL;DR: The Zhen trigram (☳) is the single trigram symbolizing Thunder, with the Wood element, located in the Later Heaven East position, consisting of one yang line below two yin lines. The Shuogua Zhuan (a chapter of the Ten Wings, traditionally attributed to Confucius) says Zhen is movement, is the dragon, is the foot, is the eldest son, is the East. Nhật Nguyệt's suggestion: use these original symbols as a foundation when researching, and do not view the trigram as an absolute tool for predicting work, relationships, or health.
What is the single Zhen trigram in the Bagua?
The Zhen trigram (☳) is one of the eight single trigrams of the Bagua (Bát Quái), representing Thunder, with the Wood element in the Five Elements, and the East in the Later Heaven arrangement. The trigram consists of one yang line at the bottom and two yin lines stacked above. This is one of the most familiar trigrams when consulting the I Ching (Kinh Dịch).
What is the structure of the Zhen trigram?
The Zhen trigram has three lines: the first line is yang, the second and third lines are yin. If you picture qi moving from below upward, the yang line at the base shows a newly born source of yang energy surrounded by two layers of yin. When that energy accumulates enough, it bursts forth and creates movement, a shaking.
What does the Shuogua say about the Zhen trigram?
The Shuogua (Thuyết Quái) is a chapter of the Ten Wings (Thập Dực), traditionally attributed to Confucius; modern scholarship does not regard this attribution as proven. Below, four layers are separated out: the original text of the Shuogua, named commentaries, the Nhật Nguyệt understanding, and a suggestion for today.
The original text of the Shuogua on the Zhen trigram
The Shuogua writes:
- Chapter 3: 雷風相薄。 (Lôi phong tương bạc) - Thunder and wind strike against each other[1].
- Chapter 4: 雷以動之。 (Lôi dĩ động chi) - Thunder sets all things in motion[1].
- Chapter 5: 帝出乎震。萬物出乎震，震，東方也。 (Đế xuất hồ Chấn. Vạn vật xuất hồ Chấn, Chấn, Đông phương dã) - The sovereign comes forth from Zhen. All things come forth from Zhen; Zhen is the eastern direction[1].
- Chapter 6: 動萬物者，莫疾乎雷。 (Động vạn vật giả, mạc tật hồ lôi) - Of things that set all beings in motion, none is faster than thunder[1].
- Chapter 7: 震，動也。 (Chấn, động dã) - Zhen is movement[1].
- Chapter 8: 震為龍。 (Chấn vi long) - Zhen is the dragon[1].
- Chapter 9: 震為足。 (Chấn vi túc) - Zhen is the foot[1].
- Chapter 10: 震一索而得男，故謂之長男。 (Chấn nhất sách nhi đắc nam, cố vị chi trưởng nam) - Zhen obtains a male on the first seeking, so it is called the eldest son[1].
- Chapter 11: 震為雷、為龍、為玄黃、為敷、為大涂、為長子、為決躁、為蒼筤竹、為萑葦。其於馬也，為善鳴、為馵足、為的顙。其於稼也，為反生。其究為健，為蕃鮮。 (Chấn vi lôi, vi long, vi huyền hoàng, vi phu, vi đại đồ, vi trưởng tử, vi quyết táo, vi thương lang trúc, vi hoàn vi. Kỳ ư mã dã, vi thiện minh, vi chú túc, vi đích tảng. Kỳ ư giá dã, vi phản sinh. Kỳ cứu vi kiện, vi phiên tiên) - Zhen is thunder, is the dragon, is the black and yellow color, is spreading out, is the great road, is the eldest son, is decisiveness and impatience, is young green bamboo, is reeds. As for horses, it is good neighing, white hind legs, white forehead. As for crops, it is growing in reverse. At its utmost it is strength, it is luxuriant freshness[1].
Named commentaries
Zhu Xi, in the Zhouyi Benyi, in the section on the image-chant of the eight trigrams, records the mnemonic for the trigram's image: 震仰盂 (Chấn ngưỡng vu) - Zhen is like an upturned bowl. This mnemonic helps identify the shape of the Zhen trigram with one yang line below and two yin lines above, like a bowl turned face up.
The Nhật Nguyệt understanding
In the Nhật Nguyệt understanding, the Zhen trigram in the Shuogua is not only Thunder, but also the beginning of movement, the East, the eldest son, the foot. These images all revolve around the idea of bursting forth from below, from accumulated inner strength, matching the figure of one yang line beneath two yin lines. When consulting the Zhen trigram, one should take these original images as the foundation before extending into other areas.
A suggestion for today
A suggestion from Nhật Nguyệt: If you are weighing a decision involving a beginning, prepare your inner strength before acting. You should not rely entirely on the trigram to decide matters of work, relationships or health; combine it with reality and professional advice.
What are the main images of the Zhen trigram according to the Shuogua?
The images below are taken directly from the Shuogua zhuan and the Nhật Nguyệt core-property table:
| Image | Content according to the Shuogua |
|---|---|
| Nature | Thunder (雷) |
| Five Elements | Wood |
| Later Heaven direction | East |
| Animal | Dragon (龍) |
| Body part | Foot (足) |
| Family | Eldest son (長男) |
| Character | Movement (動), decisiveness and impatience (決躁) |
| Color | Black and yellow (玄黃) |
| Plants | Young green bamboo (蒼筤竹), reeds (萑葦) |
| As for horses | Good neighing (善鳴), white hind legs (馵足), white forehead (的顙) |
| As for crops | Growing in reverse (反生) |
On direction, the Shuogua states clearly that Zhen is the East in the Later Heaven system. The Earlier Heaven number of Zhen is 4, which differs from the Later Heaven system; schools using Earlier Heaven and Later Heaven may give different numbers and directions, so when consulting you need to know which system you are using.
The Zhen trigram in relation to other trigrams
When the eight single trigrams combine with one another into the 64 doubled trigrams, the energy of Zhen blends with other energies to create specific situations. When Zhen is below (the inner trigram), it shows a driving force from within; when Zhen is above (the outer trigram), it indicates impacts, events from outside. This combination creates a multi-dimensional picture of a situation. The 64 doubled trigrams are not a tool for absolute prediction of fate but a mirror reflecting typical patterns of situation.
Quick reference table: the single Zhen trigram
| Aspect | Content |
|---|---|
| Earlier Heaven number | 4 |
| Chinese character name | 震 |
| Symbol | ☳ |
| Natural image | Thunder |
| Sino-Vietnamese element in doubled trigram names | Lôi |
| Five Elements | Wood |
| Later Heaven direction | East |
| Three lines, first line at the bottom | first yang, second yin, third yin |
The figures in the table match the results of the lookup tools on Nhật Nguyệt.
Traditional origins of the Bagua and the Shuogua
By tradition, the Bagua is attributed to Fuxi, the 64 trigrams to King Wen and the Duke of Zhou, and the Ten Wings (among them the Shuogua) to Confucius. Modern scholarship does not regard these attributions as proven. When reading the I Ching, one should distinguish between traditional attribution and historical evidence.
