How to use Zhouyi for divination

According to Zhu's explanation, the basic steps of divination are "four camps", that is, "dividing two camps", "hanging one camp", "praising four camps" and "returning to the strange". The so-called split into two is to randomly divide forty-nine yarrow trees into two piles; Hanging one is to take one from the left pile and put it between the fingers of the left hand; Step 4, count the left and right piles of yarrow in groups of four; To return to seven is to merge the remaining "odd" in the two piles (the last four are enough for a group) and add the one that hangs one, so that the result is either five or nine, which is called "one change". After the first change, remove 59, mix the remaining 40 or 40 yarrows together, and then carry out the "second change" and "third change" according to the above method, and the result is either four or eight. After three changes, the sum above is subtracted, and the remaining numbers are thirty-six, thirty-two, twenty-eight, twenty-four, and then divided by four to get the four numbers of nine, eight, seven and six respectively. Nine is Lao Yang, eight is Shaoyin, seven is Shaoyang, and six is Laoyin. This is the so-called "crossing method" Another method is to match the "odd numbers" mentioned above, that is, five, nine, four, eight and so on. According to numbers, odd numbers are odd numbers and odd numbers are even numbers, thus determining yin and yang, old and young. This is the so-called "hanging method". For example, during the May 4th Movement, Lao Yang, and September 8th, the old yin and the young yang were two more and one less, and the young yin was two more and one less. Such three changes determine one hexagram, and six hexagrams need eighteen changes, that is, "ten changes into eighty percent hexagrams."