Both the crown and the weak crown are men over 20 years old. Crown: refers to an adult man who has reached the age of 20. Coronation: Ancient men held a coronation ceremony at the age of 20 and put on hats worn by adults. ) weak crown: the ancients were crowned at the age of 20 to show adulthood, but they were still not strong or young, so they were called "weak".

Kindergarten: ten years old. (Book of Rites Quli Shang: "Ten years of life, learning at a young age." Because there were no punctuation marks in ancient Chinese characters, people intercepted the word "kindergarten" as a proxy for ten years old. )

Chai Jin Year: The girl is twelve years old.

Cardamom: The woman is thirteen years old.

Chi Xue: Fifteen. (The Analects of Confucius: Confucius said, "Nine times out of ten, I am determined to learn ...")

There is also logistics: the woman is fifteen years old. (The Book of Rites: "The woman died in five years." )

Jasper's youth broke the melon: the woman was sixteen. (In the old days, scholars took the word "melon" as 2008, which was called sixteen years old, and was mostly used by women. )