时光是陪你最久的爱人岁月是你恨最久的仇人
[shí guāng shì péi nĭ zuì jiŭ de ài rén suì yuè shì nĭ hèn zuì jiŭ de chóu rén]
Time is described as the longest companion and love, while the passage of time (years) is the longest-lasting grudge. This conveys bittersweet emotions about aging.