How to explain the usage of nine and six in the Book of Changes?

Summary: In the Book of Changes, it is said that nine hexagrams are used as dry ones, and six hexagrams are used as Kun. Nine hexagrams are used because all six hexagrams are negative, indicating that dry hexagrams are becoming Kun, and six hexagrams are used because all six hexagrams are old yin, indicating that Kun is becoming dry hexagrams.

Simply put, if all six are 9, use 9, and if all six are 6, use 6.

In ancient divination, only one of the four numbers 6, 7, 8 and 9 was predicted. 6 and 8 were yin, 7 and 9 were yang, and they were entering into negative retreat, so 6 was old yin, 8 was less yin, 7 was less yang and 9 was Lao Yang.

Therefore, when all six hexagrams are 6 or 9, the obtained Kun hexagrams or dry hexagrams will be in a state of imminent change, which is called "using six" and "using nine".

The Book of Changes holds that everything in the world is in an endless development, and expounds this "natural" law.

This law reveals the characteristics of the whole universe, including the attributes of everything in the world.

The development of everything has a "fixed number" and a "variable". There are rules for definite numbers, but no rules for variables. Fixed numbers contain variables, and variables also contain fixed numbers. Whether it is a fixed number or a variable, the overall situation remains unchanged.

Easy to have Tai Chi, Tai Chi gives birth to two instruments, two instruments give birth to four elephants, and four elephants give birth to gossip. Continuous gossip is like being in it, so it is important, so it is difficult to be in it. Soft and hard push each other, change in it and move in it.