Érlìzhīnián de tā kāishǐ sīkǎo rénshēng de fāngxiàng.
Now at the age of thirty, he began to contemplate the direction of his life.
Tips
history
From 《论语·为政》: '吾十有五而志于学,三十而立,四十而不惑。' Confucius lists life milestones — at 15 he committed to learning, at 30 he 'stood firm' (established himself). 而立 literally means 'and thus established'.
culture
One of a set of Confucian age-idioms: 而立之年 (30), 不惑之年 (40), 知命之年 (50), 耳顺之年 (60), 古稀之年 (70). Often used in biographies, birthday speeches, and formal writing.