日子 (rì zi) means “day; a (calendar) date; days of one's life”. It is an HSK 5 Chinese word in the HSK 3.0 vocabulary.
退休以后他过上了平静安宁的日子享受生活。
Tuìxiū yǐhòu tā guò shàng le píngjìng ānníng de rìzi xiǎngshòu shēnghuó.
After retirement, he lived peaceful and tranquil days enjoying life.
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