起早贪黑

Explanation: Get up early, sleep late. Described as hard work. 　　Usage: Joint type; as predicate, object; with compliment 　　Source: Zhou Libo, "Storm" Part One: "We Bitter people, morning and afternoon, dig pull the block, eating willow leaves." Thesaurus:  day and night, toil night and day, pass from night to morning, travel or toil night and day, neglect one's meals and sleep, rise early in the morning and late, start work early and knock off late, round the clock, On Star with Phi, round the `clock all day and all night