1, 20 Don't be confused, it means that men in ancient China came of age at the age of 20, and were crowned to show their manhood. Before that, it was a bun, also known as the "total angle". Standing at the age of 30 means that people must determine their life goals and development direction at the age of 30.

2. Standing at 30, an idiom in China, originally meant that people should establish their own values of life stability and principles of doing things and being a man around the age of 30, such as Confucius' standing at 30. Modernity refers to achievement. From "The Analects of Confucius for Politics": "Determined to learn five out of ten, stand at thirty."