A set of symbolic symbols in ancient my country. Use one to represent Yang, use - to represent Yin, and use three such symbols to form eight forms, called Bagua. Each hexagram represents a certain thing. Qian represents heaven, Kun represents earth, Kan represents water, Li represents fire, Zhen represents thunder, Gen (gèn) represents mountain, Xun (xùn) represents wind, and Dui represents Ze. The eight trigrams are combined with each other to obtain sixty-four hexagrams, which are used to symbolize various natural and human phenomena. In traditional Chinese medicine, Bagua refers to the eight acupuncture points surrounding the palm of your hand.

"The Book of Changes" is an ancient and splendid cultural treasure. The ancients used it to predict the future, decide on national affairs, reflect current phenomena, measure the sky above, the earth below, and personnel affairs. However, this is just a means that the ancients relied on before they mastered the scientific method, and it is not real science. Although some understandings are consistent with science, it is because this understanding happens to be scientifically reasonable, but it cannot be said to be scientific. It can only be regarded as a culture.