How old is fortune telling _ how old is fortune telling more appropriate?

Why do fortune tellers like to say children 15 years old?

Fifteen years old has no special significance except going to school or studying. It should be a carefree age. Ancient people had a special name for age, and fifteen years old was a year of study. The Analects of Confucius: Confucius said, "Five out of ten people are determined to learn ... At the age of fifteen, an ancient woman combed her hair and put on a kind of jewelry called a necklace.