Seven laws of geomantic omen

It is mentioned in the Book of Changes that the life phenomena of many creatures on the earth are related to seven and multiples of seven, including us. For example, saving a life is better than building a seven-level pagoda. It takes seven inches to kill a snake. Husband and wife passed a what? The itch of seven years, what period do you want after death, the first seven!

Then the Big Dipper has seven stars, twenty-eight stars and multiples of seven. We have 14 knuckles in one hand and 28 knuckles in both hands. There are seven other tricks for people: the expected date of birth of chicken is 2 1 day, that of duckling is 28 days, that of dog is 63 days, that of pig is 1 12 days, and that of human is 280 days, all of which are multiples of 7. This natural law was recorded in the Book of Changes thousands of years ago.