Why does the Book of Changes use "Forty-nine for divination with yarrow"?

49 is a big derivative! There are too many changes in this derivative, and this can be expressed as gossip, hehe! Different personal studies have different usages.

Yarrow belongs to the category of voodoo, which is to connect the gods and convince others.

After that, there was turtle divination, in which yarrow evolved into nonyl divination, which is now the big six nonyl.

Now it is recognized that the diviners in Liu Ren are the most accurate, but the results of real research are mixed.

In ancient times, yarrow was recorded with hundreds of stems. As for the authentic divination method, no one knows that it is a divination method of big sacrifice, and no one else can see it, so it has not been handed down. As for Yarrow now, it is not known whether the record is right or wrong.