Yi-ology belongs to the study of the operation law of everything and its relationship under the guidance of the academic thought of correspondence between man and nature. Since the Spring and Autumn Period and above, China's scholarship has been integrated with the Yi Studies. From Fu's divination to Lao Zi's going abroad, official learning gradually evolved into private learning. There is a gradual development before and after the Yi-ology, and a hundred schools of thought contend, so it is easy to divide.
Since Confucius praised the Book of Changes, the Book of Changes has always been regarded as a Confucian classic, the first of the six classics, but it is outside of Confucianism. "There are two schools of Yi-ology, which develop in parallel with Confucian Yi-ology: one is Yi-ology, which still exists in the old forces; The other is Laozi's Taoist Yi.
Therefore, since Confucius praised Yi, China Yi-ology has been divided into three branches, 1 ". From the development history of Yi-ology, the pre-Qin Yi-ology developed into the old Confucius era, forming three branches: Taoist Yi, Confucian Yi and Artist Yi.
History of yi studies
1. In the fishing and hunting era, the Yi Gua symbol system began to form, and the astronomy of Gaitian theory sprouted.
2, farming society, forming Yi Gua.
3. In the late Neolithic period, digital hexagrams were found in Songze cultural site.
4. 6400 years ago, Yangshao cultural site found Tianyuan local tomb pit, Beidou, ghost table and other things.
5.5000 years ago, the local Tianyuan Altar was found in the ruins of Hongshan Culture.