焚膏继晷 fén gāo jì guǐ

DEFINITIONS

  1. to burn the midnight oil (idiom); to work continuously night and day

CHARACTERS

焚 fén burn
膏 gāo
HSK 4
grease, fat; paste, ointment
继 jì
HSK 4
continue, maintain, carry on
晷 guǐ shadows of sun; time; sundial