春光乍泄

chūn guāng zhà xiè

spring sunshine emerges to bring the world alive (idiom)

to give a glimpse of sth intimate (e.g. one's underwear)

春

chūn

spring (season)

光

guāng

light; ray (CL:道[dao4])

乍

zhà

at first

泄

xiè

(bound form) to leak out; to discharge; (fig.) to divulge