The study of the I Ching needs to be understood from two aspects: Yili and Symbolism.
In terms of easy reasoning: 1. Yin and yang are the general laws of change in all things;
2. The restraint of the five elements is the internal driving force for the development of things;
3. Bagua represents different directions and states of time and space.
In terms of the number of images: 4. Hetu Luoshu and the successive heavenly eight trigrams are used to deduce the laws of change in the universe.
5. The innate hexagram is the body, and the acquired hexagram is used.
6. The order of the sixty-four hexagrams is from one to three (see the figure below).
7. The sixty-four hexagrams are divided into a group of two hexagrams, a total of 384 groups.
8. Dry is the sky, Kun is the earth, the earthquake is the eldest man, and the eldest daughter is Xun.
9. Yang Yao means strong and upward; Yin means supple and downward;
10. The movement up and down produces four kinds of relationships - that is, the relationship between the upper and lower warp and weft - the relationship between the monarch and the people - the relationship between the monarch and the minister - the relationship between father and son - the relationship between husband and wife
11, dry three - pure yang nature (such as dragon), but things should not be too rigid (Kanglong has regrets);
12, Kun Liuxuan - pure yin nature (such as snakes), but things should not be too supple (flying dragon in the sky);
13. Zhenyang Yu -- the positive active attacker belongs to the wood fire type person;
14. Gen Covered Bowl - The male main keeper belongs to the earth gold type person; (e.g. dogs).
15. Lack of upper and lower qi -- those who are born without intersecting and whose minds are not strong belong to the golden water type people. (e.g. water).
16, from the void - the cathode is yang, so it is said that the yin deficiency is prosperous. (as in the sun).
17, Kanzhong is full - Yang Sheng is yin and slight, so it is said that Yang is real and Yin is empty.
Such as the moon) 18, Yamazawa ventilation - soil can accept gas, so the mountain manages people, Ding water, and wealth.