There is an ancient poem that says, "Stand at thirty".

"Standing at 30" does not come from any ancient poems, but from the Analects of Confucius.

The original text is as follows:

Confucius said, "I have five out of ten, and I am determined to learn it." Stand at thirty, don't be confused at forty, know your destiny at fifty, listen at sixty, and walk at seventy. "

Related translation:

Confucius said: "I am determined to study at the age of 15, I can stand on my own feet at the age of 30, I am not confused when things happen at the age of 40, I can know things that are not dominated by manpower at the age of 50, I can listen to opinions put forward by different people at the age of 60, and I can do things according to my own wishes at the age of 70, but I will not go beyond etiquette."