How is the horoscope called a night outing for two mice?

Everyone's date of birth is matched by stem and branch, which is called "four pillars". As long as you see the combination of two branches in the four pillars, it is called a night outing for two rats. For example, a person born in the year of the rat, that is, a person who belongs to the rat, is called a double-rat nocturnal trip if he is born in "February" or the second day or the second day.

For example, when I was born on December 16th, 2020, it was the year of Gengzi, the ugly month, the day of Bingzi and the day of Wuzi. This is the "night outing of two mice". Of course, this group of eight characters is the year of the rat, and there is one more. It means that there are only two "sons" in the four pillars of a birthday, that is, going out for a night outing with two mice. Of course, it is better and more perfect to be born as a son.