What does 20 years old mean?

20 years old means that there are many nodes in life, and 20 years old is the first node that needs to face up to confusion and stop being confused. Many people are facing the situation that they are about to enter the society. 20 years old is actually an attitude.

Not confused means 40 years old, and it also means that when things happen, you can tell clearly without doubt. The Analects of Confucius says "forty without being confused", which means that when you are 40 years old, you firmly believe in your words and deeds, and then you use "not being confused" to represent 40 years old.