知过必改 Know your mistakes and correct them
Explanation
指认识到自己的错误后就一定改正。体现了一种积极向上的精神，鼓励人们勇于承担责任，不断完善自己。
It means to admit one's mistakes and correct them. This reflects a positive and progressive spirit, encouraging people to take responsibility and continuously improve themselves.
Origin Story
从前，有一个名叫小明的孩子，他调皮捣蛋，经常惹老师和家长生气。有一次，他在课堂上偷偷地玩玩具，被老师发现了，老师严厉地批评了他。小明意识到自己做错了，心里感到非常后悔。他向老师诚恳地道歉，并保证以后再也不会犯同样的错误。从那以后，小明认真学习，积极参加学校活动，不再调皮捣蛋，成了一个好学生。他深刻地体会到知过必改的重要性，并把它作为自己人生的座右铭。小明的故事告诉我们，人非圣贤，孰能无过？重要的是要勇于承认错误，并积极改正。只有这样，才能不断进步，成为一个更好的人。 后来，小明长大成人，成为了一名优秀的工程师。在一次重要的项目中，他发现自己设计方案中存在一个严重的错误，这可能会导致项目的失败。小明没有隐瞒这个错误，而是立即向项目组汇报，并积极寻求解决方案。在他的努力下，团队及时解决了这个问题，项目得以顺利完成。小明的事迹受到了大家的赞扬，他用自己的实际行动诠释了“知过必改”的真谛。
Once upon a time, there was a child named Xiaoming who was mischievous and often angered his teachers and parents. Once, he secretly played with toys in class and was caught by his teacher. The teacher severely criticized him. Xiaoming realized he had done wrong and felt very regretful. He sincerely apologized to his teacher and promised he would never make the same mistake again. From then on, Xiaoming studied hard, actively participated in school activities, and stopped being mischievous; he became a good student. He deeply understood the importance of admitting mistakes and correcting them, and made it his life motto. Xiaoming's story tells us that no one is perfect, who doesn't make mistakes? The important thing is to admit mistakes bravely and actively correct them. Only in this way can we make continuous progress and become a better person.
Usage
常用来形容一个人有自知之明，能够改正错误。
Often used to describe someone who is self-aware and able to correct their mistakes.
Examples
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他犯了错，知过必改，值得表扬。
tā fàn le cuò, zhī guò bì gǎi, zhí de biǎoyáng
He made a mistake, but he admitted it and corrected it, which is commendable.
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知错能改，善莫大焉。
zhī cuò néng gǎi, shàn mò dà yān
To know one's mistakes and to correct them is a great virtue.