Bagua originated from China's ancient thoughts about the formation of the basic universe, the rotation relationship between the earth and the sun, and the combination of agricultural society and life philosophy. The original data source is the Book of Changes in the Western Zhou Dynasty, which contains 64 hexagrams, but no images. The Book of Changes records that "it is easy to have Tai Chi, and two devices are born. Two instruments give birth to four elephants, and four elephants give birth to gossip. " The two instruments are yin and yang, which can be extended to heaven and earth, day and night, and the difference between men and women. These four images are Shaoyin, Shaoyang, Taiyin and Sun. In different periods, it can correspond to four directions, four seasons and four elephants respectively. Qinglong lives in the east, with the spirit of spring, and shaoyang is the main one; Suzaku lives in the south, the breath of summer, the sun is the master; The white tiger lives in the west, with autumn qi and less yin; Xuanwu is located in the north, and the atmosphere in winter is mainly lunar. The four seasons of health care also correspond to: birth, growth, harvest and hiding. Eight diagrams, that is, dry, Kun, Xun, exchange, gen, earthquake, separation, Kan. Represents the meaning of heaven and earth respectively, which is explained in detail below. Gossip symbol description

Some scholars in the Song Dynasty thought that the four images played eight diagrams (directions) and eighty-eight generated sixty-four hexagrams, which was Fuxi Eight Diagrams, also called innate gossip; Some scholars believe that gossip should come from Zhou Wenwang's theory of feeling Kun. He believes that the intersection of heaven and earth produces everything, and heaven is dry and earth is Kun. The other six hexagrams of gossip are their children: Zhen is the eldest male, Kan is the middle male, and Gen (pronounced in Mandarin: gè n; Cantonese: gan3, the same as "Jin", Wu Yin: ken (go /3)) is a boy; Xun (Mandarin pronunciation: xù n; Cantonese: seon3, the same as "letter"; Five tones: Sen (going /3)) is the eldest daughter, leaving for the middle girl and becoming a girl, which is also called gossip. The eight diagrams symbols usually appear together with the Taiji diagram, which represents the ultimate truth of China's traditional belief (Confucianism and Taoism): "Tao". The "hexagram" of eight diagrams is a cognitive word, which comes from Gui Cong Bu. Gui, referring to Tu Gui, began to measure the shadow of the sun with mud columns. Bu, the meaning of measurement. Set up eight diagrams to measure the sun shadow, that is, summarize and record the observed sun shadow from the four corners to form the image of eight diagrams.

The most basic unit of gossip is hexagram, which is mostly a special symbol describing the change of sun shadow. There are two types of hexagram, Yang stands for sunshine and Yin stands for moonlight. Each hexagram has three hexagrams, representing the three talents of heaven and earth, including the whole celestial movement and meteorological changes. These astrological studies use land use theory to understand the whole process of planting and collecting. The human sector refers to the combination of astronomy, geography and personnel in order to carry out production and life according to these laws. The arrangement order of each hexagram is from bottom to top, the bottom horizontal is called the first horizontal, the middle horizontal is called the second horizontal, and the top horizontal is called the third horizontal. Eight diagrams represent eight basic images: dry represents heaven, Kun represents earth, earthquake represents thunder, Xun represents wind, gen represents mountain, exchange represents ze, ridge represents water, and separation represents fire. They are always called classics, and the arrangement of two of the eight classics constitutes sixty-four hexagrams.