zhǐ zhēng dàn xī
see 只爭朝夕|只争朝夕[zhi3 zheng1 zhao1 xi1]
只
zhǐ
variant of 只[zhi3]
争
zhēng
to strive for
旦
dàn
(literary) dawn; daybreak
夕
xī
(bound form) sunset; dusk