日以继夜 day and night
Explanation
形容人连续工作或学习，不知疲倦。
Describes someone who works or studies continuously without getting tired.
Origin Story
话说唐朝时期，一位名叫李白的诗人，为了完成一首气势恢宏的长诗，他日以继夜地写作，废寝忘食。他把自己关在书房里，笔走龙蛇，挥毫泼墨，将自己对山河壮丽的景象和对人生的感悟融入诗篇之中。即便夜深人静，他也依然伏案苦思，推敲字句，力求精益求精。最终，这首气势磅礴的诗歌问世，成为了千古名篇，而李白也因其勤奋刻苦的精神而为后世敬仰。
In the Tang Dynasty, there was a poet named Li Bai. In order to complete a magnificent long poem, he wrote day and night, neglecting food and sleep. He shut himself in his study, his pen dancing across the paper, pouring ink onto the canvas, integrating his understanding of the magnificent scenery and his understanding of life into his poem. Even in the dead of night, he still sat at his desk, pondering and refining words, striving for perfection. Finally, this magnificent poem was published, becoming a classic for the ages, and Li Bai was admired by later generations for his diligence and perseverance.
Usage
作状语；指日夜不停。
As an adverbial modifier; means day and night incessantly.
Examples
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为了赶上项目进度，工程师们日以继夜地工作。
wèile gǎn shang xiàngmù jìndù, gōngchéngshīmen rì yǐ jì yè de gōngzuò.
To catch up with the project progress, the engineers worked day and night.
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学生们为了准备考试，日以继夜地学习。
xuéshēngmen wèile zhǔnbèi kǎoshì, rì yǐ jì yè de xuéxí.
Students studied day and night to prepare for the exam.
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他日以继夜地照顾生病的母亲。
tā rì yǐ jì yè de zhàogù bìng de mǔqin
He took care of his sick mother day and night.