What is the formula for fattening pigs on the same day?

"Four or six don't break the circle, seven is the birthday of the pig".

It means that pigs can't be killed on the fourth, sixth and seventh days of the lunar calendar, that is, the ninth day of each month, that is, April, June, July, 14, 16, 17, 24, 26 and 27.

Why do you say "four or six don't break the circle":

Why can't you kill pigs every four days? Because it is not conducive to using this pigsty to raise pigs in the future, it is necessary to choose another place to build a pigsty, because if this pigsty raises pigs again, pigs may get sick and die.

The main reason is that "four" and "death" are homophonic, so it is unlucky to kill a pig and sew for four days.

Why can't you kill pigs on the day of sewing 6? Because 6 is a very auspicious number, which means smooth.

If you kill pigs on the sixth day after sewing, and then use this pigsty to raise pigs in the future, it is not conducive to the growth of pigs, and pigs are prone to illness and will be very unhappy.