On the Algorithm and Inspiration of Korean Age ...

It's not a Korean algorithm, but it's actually handed down from China. Those who have grandparents at home (who don't want to tell fortune) will know that pregnancy and nominal age are counted as one year each (those born in nominal age-one year at the end of the year, now one year at the beginning of the year), and they are two years older ~

I won't repeat what the other two parents upstairs said ~