What is the main explanation?

"Yi" is a term in the Stretching Method, which is mainly based on this kind of divination. At the same time, this is also based on Yao's prediction of good and bad luck. This is discussed in detail in Zhu's Zhouyi Shenwu. Those who have changed their hexagrams are called hexagrams, and good or bad luck can be judged by the method of hexagrams. According to Wu Dao, divination is based on seven kinds of divination: < 1 > One divination changes, and divination is based on it. In this hexagram, the two unchangeable characters are the main ones, and the following ones are the main ones. If the five hexagrams change, the unchanged characters in the hexagrams are the main ones. If the six hexagrams are completely changed, the two hexagrams of Gankun will account for 96.

Shang is the main explanation of Zhouyi Shenwu, and the comments on Fang Jingyi are not limited to this, which depends on the world's reaction to the flying of six beasts and ten gods and the generation of grams by five elements.