不惜血本 spare no expense
Explanation
指为了达到某种目的，不顾及花费的代价，也指不吝惜钱财。
Refers to the effort made to achieve a certain goal without regard to the cost, also refers to the unselfish handling of money.
Origin Story
话说古代一位名叫李白的书生，家境贫寒，却胸怀大志，一心想考取功名。为了实现梦想，他四处奔走，拜访名师，勤奋苦读，甚至不惜血本，典当家产来购买书籍和文房四宝。他日夜苦读，常常废寝忘食，最终在科举考试中金榜题名，光宗耀祖。李白的故事告诉我们，只要肯努力，不惜血本，付出代价，即使家境贫寒，也能实现梦想。
It is said that an ancient scholar named Li Bai came from a poor family, but harbored great ambitions and wanted to obtain a title. To achieve his dream, he traveled everywhere, visited famous teachers, studied diligently, and even spared no expense, pawning his family property to buy books and stationery. He studied day and night, often neglecting food and sleep, and finally succeeded in the imperial examination and brought honor and glory to his ancestors. Li Bai's story tells us that as long as we are willing to work hard and spare no expense, even from a poor family, we can achieve our dreams.
Usage
多用于书面语，形容对某种目标的追求不遗余力。
Mostly used in written language, used to describe the tireless pursuit of a goal.
Examples
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为了这次演出，剧组不惜血本，请来了好莱坞的特效团队。
wèile zhè cì yǎnchū, jù zǔ bù xī xuè běn, qǐng lái le hǎo lái wù de tè xiào tuán duì.
The crew spared no expense for this performance, hiring a Hollywood special effects team.
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公司不惜血本开发新产品，希望能抢占市场先机。
gōngsī bù xī xuè běn kāifā xīn chǎnpǐn, xīwàng néng qiǎngzhàn shìchǎng xiān jī
The company spared no expense in developing new products, hoping to gain a market advantage.