1. Standing at thirty is a Chinese idiom. The original meaning is that people establish their own stable values ????and principles of doing things and being a person around the age of thirty. For example, Confucius stands on etiquette at thirty. Modern times mostly refer to achievements. From "The Analects of Confucius·Wei Zheng".

2. This is Confucius's self-evaluation of the state of life he reached at the age of 30 in "The Analects of Confucius: For Politics". The original text is from Confucius: "When I was fifteen, I was determined to learn; when I was thirty, I was established; when I was forty, I was not confused; when I was fifty, I knew the destiny; when I was sixty, my ears were obedient; when I was seventy, I followed my heart's desires and did not exceed the rules." Although not everyone is like this. Although one can be considered a Confucius sage, later generations often regard these self-comments of Confucius as the ideal state of life that should be achieved at different stages of life.