Li Diagram is the third in the congenital eight trigrams, the ninth in the acquired eight diagrams (there is no fifth in the acquired eight trigrams). The symbol of Li diagram is composed of two solid lines and a dotted line in the middle (☲). Li diagram belongs to Yin diagram .
In nature, Li diagram represents fire, and in the middle of it is dotted line. Just like the characteristics of fire, the middle temperature of fire is lower than the outside temperature. At the same time, in the five elements, Li diagram also represents the five elements of fire; in the northern hemisphere, the temperature in the south is higher than that in the north, so the position of Li diagram represents the positive south, which is summarized by the ancients according to the natural law and life, so all things cannot leave the natural law, which is the mysterious place of the book of changes and the eight diagrams.
The color represented by the Li diagram is red; in human body, the Li diagram represents human eyes, heart, blood and Small intestine in digestive system; in nature, the Li diagram represents lightning, light, sun, desert, Gobi and other information, and the things with dry characteristics belong to the Li diagram . At the same time, the empty objects in the middle are also the Li diagram, such as the eyes and fire mentioned earlier; the earth branch of the Li diagram is Wu, and the Li diagram represents time It is the May of the lunar calendar, and it also represents the year, month, day and hour which the earth branch is Wu. The characters corresponding to the Li diagram is the sencond daughter in the family, the literati in the society, etc.