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

The difference: and the crown, that is, when a man reaches the age of 20, his hair is tied up and he can wear a hat, indicating that he has reached adulthood and made an adult ceremony. This is a ceremony, and he can cultivate himself, rule the country and level the world in the future.

A weak crown is a man who has just turned 20 years old. Although he is old, he has not held a ceremony and is still very weak. This is called a weak crown. The main difference lies in whether a ceremony was held.

"Weak crown" is the title of a man over 20 years old, and "and crown" is a kind of etiquette held at that time. In ancient times, Han men were called weak crowns at the age of 20.

At this time, the crown ceremony is called the crown, that is, wearing a hat that represents an adult to show adulthood, but the body is still not strong and still relatively young, so it is called "weak." Later generations generally refer to the age of men around 20 and cannot be used for women.