老大徒伤悲 (老大徒傷悲) lǎodà tú shāngbēi

lǎodà tú shāngbēi phrase vain regrets of old age
Domain: Idiom 成语
Notes: (CC-CEDICT '老大徒傷悲')

Also contained in

少壮不努力,老大徒伤悲