令行禁止 Orders are carried out and prohibitions are enforced
Explanation
形容法令严正，执行认真。
It describes laws and regulations that are strict and carefully implemented.
Origin Story
商朝末年，暴君纣王昏庸无道，朝政腐败，民不聊生。西伯侯姬昌深感民生疾苦，暗中积蓄力量，准备推翻商朝的统治。临终前，他将继承人姬发叫到床前，郑重地嘱咐道："我死之后，你一定要励精图治，做到令行禁止，才能成就王业！"姬发谨记父亲的教诲，在继位后，他励精图治，整顿朝纲，严明法纪，以身作则，使得朝中上下，一切政令都能快速有效的执行。最终，姬发率领周军推翻了商朝的统治，建立了周朝，开创了新的盛世。
At the end of the Shang Dynasty, the tyrannical King Zhou was incompetent and cruel, resulting in corrupt governance and widespread suffering among the people. The Duke of Xibo, Ji Chang, deeply felt the people's hardship and secretly gathered strength to overthrow the Shang Dynasty. Before his death, he summoned his heir, Ji Fa, to his bedside and solemnly instructed: "After my death, you must diligently govern and ensure that orders are promptly executed and prohibitions are strictly observed, only then can you achieve kingship!" Ji Fa kept his father's teachings in mind. Upon succeeding to the throne, he diligently governed, rectified the administration, strengthened laws and discipline, and led by example. As a result, all government decrees were executed swiftly and effectively throughout the court. Eventually, Ji Fa led the Zhou army to overthrow the Shang Dynasty and established the Zhou Dynasty, ushering in a new era of prosperity.
Usage
常用来形容军队纪律严明，政令畅通。
Often used to describe the strict discipline of the military and the smooth implementation of government orders.
Examples
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军队纪律严明，令行禁止。
jūnduì jìlǜ yánmíng, lìngxíng jìnzhǐ.
The army's discipline is strict, and orders are carried out without delay.
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这项命令必须令行禁止，不容更改。
zhè xiàng mìnglìng bìxū lìngxíng jìnzhǐ, bùróng gēnggǎi
This order must be carried out immediately and without modification.