- 夙夜匪懈 sùyèfěixiè to work tirelesslyto work diligently from morning to night without rest; to be hardworking day and night
- 夙夜在公 sùyèzàigōng to work day and night(literary) to be at the office morning and night; to work tirelessly for the public good or in an official capacity
- 夙夜不怠 sùyèbùdài to work hard day and nightto toil day and night without relaxation; to be diligent at all hours
- 夙夜不懈 sùyèbùxiè to work hard day and nightto be diligent and tireless day and night; to work hard around the clock without slacking