而立之年

Explanation: To three-year-old who can stand age. After the generation of three-year-old said. 　　Usage: Partial official; as attributive, adverbial; of its 30-year-old 　　Source: Qin Confucius' Analects of Confucius as the government ":" I have five, as for the study, thirty, forty and middle age. " Thesaurus:  Year when the legislature, A man should be independent at the age of thirty. / At thirty, a man should be able to think for himself.