残花乱流年愁肠攒心痛
[cán huā luàn liú nián chóu cháng zăn xīn tòng]
A rather poetic expression that describes feelings of sorrow during transitional stages of life ('waning years'/'chaotic times'). It speaks about the internal conflict and emotional pain brought by fleeting beauty ('residual flowers'), implying deep nostalgia over past events or experiences, and an accumulation of sorrows and concerns.