Who knows ancient mathematics or I ching gossip? Come in and see what this passage means. Thank you.

This is the oldest divination method, which has always used 49 yarrows (Zhou Yiyang's note: there are 50 yarrows, one of which is not used to symbolize Tai Chi). This divination method is also recorded in the Book of Changes, but it is not used now. Generally, the method of divination with copper coins is used.

If you study divination, Zhou Yiyang suggested that you don't have to use this method; If you study the Book of Changes, this passage can also ignore the past. The method in copula is explained as follows:

Take a branch of fifty yarrow and put it aside, which means "there are fifty big swallows, and nine times out of ten they use it." The meaning of Yan is similar to acting and deduction, which means it is very broad, so it is called Dayan.

Divided into two, like two. When mowing the grass, divide your hands into forty-nine yarrow trees, turn over two at will, and put the right hand aside. This is "divided into two like two". Why do you like two? It means the separation of yin and yang, imitating the principle of heaven and earth. This method of divination is not a superstition, but a physical and natural function, that is to say, Tai Chi gives birth to two kinds of instruments. This is the first camp.

"Hang an image of three", and then take one from the original right hand and hang it between the little finger and the ring finger of the left hand, which is called "hanging an image of three". The third is the three talents, that is, heaven, earth and people. This is the second camp.

"Four seasons are like four seasons" and "four seasons are like four seasons" means counting. We divide every four yarrow trees in our left hand into the last one, and the rest are like four seasons, namely, four seasons. This is the half battalion of the third battalion.

"It's like a leap", the yarrow in the left hand is divided into the last (four in each group), and the rest of the grass is placed between the ring finger and the middle finger of the left hand, no matter how much. Grab the sound, that is, the remaining yarrow, that is, half of the fourth battalion.

Then, in the same way, take the half divided by the original right hand between the middle finger of the left hand (the second half of the third battalion), which is the second half of the fourth battalion. Force is like a leap. "'odd' is the remaining strategy after four years." At the age of five, I jumped again, so I should advise God. " There are two leap months in five years, symbolizing "leap again at the age of five".

At this time, the right hand put the smashed yarrow together, and then put the left hand (the first root) together with yarrow between Erli and the little finger and ring finger, which completely became the first change.

"Robbery first, then divination", then the left and right legs of yarrow are combined, and then the three changes can be combined into one after the front is divided into two, and the left and right legs are suspended and pulled back. This is to force divination again, and the four camps become easy; Ten changes into eight can become hexagrams.