焚膏继晷

Explanation: Cream: fat, refers to the candle; following: to continue to succeed; sundial: daylight. Point on the lamp, follow daylight. Described as hard work or study. 　　Usage: -Linked; as predicate, adverbial clauses; with a compliment 　　Source: Han Yu Tang "into learning solution": "Following the sundial in the anointing oil burning, Heng Wu Wu in poor years." 　　Examples: According to legend, many scholars present calamity, blame the school, ~, resulting in loss of Ming. (Qing Zhang Chao, "Yu Chu Chi three people wide Lennon superfluous preface") Thesaurus:  Once the candle to be, sit up and wait for daybreak, through out the night, Ti towards dry evening