Bagua



The bagua is a set of symbols from China intended to illustrate the nature of reality as being composed of mutually opposing forces reinforcing one another. Bagua is a group of trigrams—composed of three lines, each either "broken" or "unbroken", which represent yin and yang, respectively. Each line having two possible states allows for a total of 222 = 8 trigrams, whose early enumeration and characterization in China has had an effect on the history of Chinese philosophy and cosmology.

The trigrams are related to the divination practice as described within the I Ching and practiced as part of the Shang and Zhou state religion, as well as with the concepts of taiji and the five elements within traditional Chinese metaphysics. The trigrams have correspondences in astronomy, divination, meditation, astrology, geography, geomancy (feng shui), anatomy, decorative arts, the family, martial arts (particularly tai chi and baguazhang), Chinese medicine and elsewhere.

The bagua can appear singly or in combination, and is commonly encountered in two different arrangements: the Primordial (先天八卦), "Earlier Heaven", or "Fuxi" bagua (伏羲八卦) and the Manifested (後天八卦), "Later Heaven", or "King Wen" bagua.

In the I Ching, two trigrams are stacked together to create a six-line figure known as a hexagram. There are 64 possible permutations. The 64 hexagrams and their descriptions make up the book. The trigram symbolism can be used to interpret the hexagram figure and text. An example from Hexagram 19 commentary is "The earth above the lake: The image of Approach. Thus the superior man is inexhaustible in his will to teach, and without limits in his tolerance and protection of the people." The trigrams have been used to organize Yijing charts as seen below.

Trigrams
There are eight possible combinations to render the various trigrams:



Relation to other principles
The Book of Changes listed two sources for the eight trigrams. Its chapter explains the first source thus:

Legge's translation: [I]n (the system of) the Yi there is the Grand Terminus, which produced the two elementary Forms. Those two Forms produced the Four emblematic Symbols, which again produced the eight Trigrams.

Adler's translation: In Change there is the Supreme Polarity, which generates the Two Modes (兩儀; liangyi). The Two Modes generate the Four Images (sixiang), and the Four Images generate the Eight Trigrams.



This explanation would later be modified to:

"The Limitless (wuji) produces the delimited, and this is the Absolute (taiji). The taiji produces two forms, named Yin and Yang. (Adler's 2012 translation: 'Non-polar and yet Supreme Polarity ! The Supreme Polarity in activity generates yang ; yet at the limit of activity it is still. In stillness it generates yin ; yet at the limit of stillness it is also active. Activity and stillness alternate; each is the basis of the other. In distinguishing yin and yang, the Two Modes are thereby established.')" The two forms produce four phenomena named lesser yang, great yang (tai yang also means the Sun), lesser yin, and great yin (tai yin also means the Moon). The four phenomena act on the eight trigrams (ba gua), eight eights are sixty-four hexagrams.

Another chapter,, characterizes the trigram, which represents Heaven, and , which represent earth, as father and mother, respectively, of the six other trigrams, who are their three sons  and three daughters.

The trigrams are related to the five elements of Wu Xing, which are used by feng shui practitioners and in traditional Chinese medicine. The elements are Water, Wood, Fire, Earth and Metal. The Water and Fire trigrams correspond directly with the Water and Fire elements. The element of Earth corresponds with the trigrams of Earth and Mountain. The element of Wood corresponds with the trigrams of Wind (as a force that can erode and penetrate stone) and Thunder. The element of Metal corresponds with the trigrams of Heaven and Lake.

In feng shui
The bagua is a tool in the majority of feng shui schools. The bagua used in feng shui can appear in two different versions: the Earlier Heaven bagua, used for burial sites, and the Later Heaven bagua, used for residences.

Primordial bagua
Primordial bagua is also known as Fuxi bagua or Earlier Heaven bagua. In traditional Chinese medicine, this sequence is known as the prenatal sequence and is used to understand familial risk for illness or disease, similar to western medicine's understanding of formative medicine and the study of genetics. The Heaven trigram is at the top, the Earth trigram is at the bottom (the South was located at the top in Chinese maps of this period) of the bagua. The Fire trigram is located on the left, while the Water trigram is on the right. Thunder and wind form another pair, being the opposites of each other; the first is on the bottom left next to fire, while the second is next to Heaven on the top right of the bagua. Mountain and Lake form the last pair, with one opposite the to other. The adjustment of the trigrams is symmetrical by forming exact contrary pairs. They symbolize the opposite forces of Yin and Yang and represent a state in which everything is in balance.

Later Heaven bagua
The sequence of trigrams in the Later Heaven bagua is attributed to King Wen. It is also known as the postnatal bagua arrangement in traditional Chinese medicine; it is used to understand physical, emotional and environmental patterns that influence health or disease, similarly to western medicine's inquiry into functional medical science. In this arrangement, Water is placed downwards and Fire at the top; Thunder is in the East, while Lake is in the West. Contrary to the Earlier Heaven bagua, the Later Heaven bagua is dynamic; energies and the aspects of each of its trigrams flow towards the following. It is the sequence used by the Luo Pan compass, which is used in feng shui and referred to as the manifest pattern; it analyzes the movement of the qi that practitioners believe affect them.

Western bagua
The popularity of feng shui increased in the West because of the bagua of the eight aspirations. Each trigram corresponds to an aspect of life that also corresponds to one of the cardinal directions. Applying feng shui using the bagua of the eight aspirations (or bagua map for short) made it possible to simplify feng shui and to use it for the general public. Western bagua focuses more heavily on intention than the traditional forms of feng shui.

Experienced practicers of traditional feng shui disregard Western bagua for its simplicity, since it does not take into account the forms of the landscape, time, or the annual cycles. The bagua of the eight aspirations is divided into two branches: the first, which uses the compass and cardinal directions, and the second, which uses the bagua by using the main door. It is clear that, not taking into account the cardinal directions, the second is even more simplified.

Bagua map
A bagua map is a tool used in Western forms of feng shui to map a room or location and see how the different sections correspond to different aspects in one's life. These sections are believed to relate to every area or aspect of life and are divided into categories such as fame, relationships/marriage, children/creativity, helpful people/travel, career, inner knowledge, family/ancestors/health, and wealth/blessings.

In this system, the map is intended to be used over the land, one's home, office or desk to find areas lacking good chi, and to show where there are spaces that may need rectifying or enhancing in life or the environment.

For example, if the bagua grid is placed over an entire house plan and it shows the toilet, bathroom, laundry, or kitchen in the wealth/blessings area of the map, it would be said that the money coming into that particular environment would disappear very fast.



In Unicode
The bagua symbols in the Miscellaneous Symbols block of Unicode include the following:

The Miscellaneous Symbols block also encodes the constituents ⚊ (yang—U+268A; &amp;#9866) and ⚋ (yin—U+268B; &amp;#9867), as well as the digrams ⚌ (greater yang—U+268C; &amp;#9868), ⚍ (lesser yin—U+268D; &amp;#9869), ⚎ (lesser yang—U+268E; &amp;#9870), and ⚏ (greater yin—U+268F; &amp;#9871).

The hexagrams they form are separately encoded in the Yijing Hexagram Symbols Unicode block U4DC0..U4DFF.

Symbolism
In traditional Chinese medicine, including the profession of acupuncture, the Earlier Heaven and Later Heaven arrangements are used to understand the pathogenesis of disease or illness and to select treatment plans specifically related and tailored to a patient's constitution.

Flag of South Korea has four cardinal trigrams (qian, kun, kan, li) surrounding the taegeuk, or taijitu, they are specific representations of the movement and harmony of yin and yang.

Culture references
In Peking opera, a role with Daoist techniques or military strategy wears a costume decorated with taiji and bagua.

Baguazhang and tai chi are two Chinese martial arts based on principles derived from bagua.

Tekes County and Zhuge Village has a layout based on bagua.

The 2004 Philippine horror film Feng Shui and its 2014 sequel, Feng Shui 2, revolve around a cursed bagua mirror that kills those who stare into it.