What do you mean by eight-character yin?

Personally, I think the four pillars are all cloudy, belonging to soil and water. Generally speaking, the zodiac belongs to sheep, pigs, rabbits, snakes, cows, chickens and dogs. Birthdays in the lunar calendar are in February, June, July, September, October and twelfth month, and they are born on the day of ghosts and ugliness, because ghosts and children are "ghosts" and ugliness represents graves.