洁身自爱 self-respecting
Explanation
保持自身纯洁，不与邪恶势力同流合污。也指谨慎小心，不惹是生非，只顾自身利益。
Maintain one's own purity, not colluding with evil forces. It also means to be cautious and careful, not to cause trouble, and only to care about one's own interests.
Origin Story
话说古代，有一位名叫李清的读书人，他家境贫寒，但为人正直，洁身自爱。他深知在那个腐败的社会里，许多人为了蝇头小利，不择手段，同流合污。但他始终保持着自己的操守，不为权势所动，不为金钱所诱。即使生活艰难，他也宁愿清贫，也不愿与那些贪官污吏同流合污。他经常告诫自己：要洁身自爱，才能保持内心的清静，才能活得坦荡。 有一次，县令派人来征收赋税，故意刁难百姓，许多人被逼无奈，只好送些礼品贿赂官吏。李清家中虽然贫困，但坚决不肯送礼。县令大怒，将他关进牢房。在狱中，李清并没有被吓倒，他依然保持着自己的清高，坚持自己的原则。最终，他被释放出狱。人们赞扬他洁身自爱的高尚品德，并将他视为楷模。李清的故事流传至今，成为了人们学习的榜样，鼓励人们在各种诱惑面前，保持自身的纯洁，不与邪恶势力同流合污，做一名堂堂正正的君子。
It is said that in ancient times, there was a scholar named Li Qing. His family was poor, but he was honest and self-respecting. He knew very well that in that corrupt society, many people used all means to enrich themselves with petty gains and colluded with them. But he always adhered to his principles, neither influenced by power nor by money. Even when his life was difficult, he preferred to be poor rather than collude with corrupt officials. He often admonished himself: To keep oneself pure and innocent, to maintain inner peace, and to live a righteous life. Once, the county magistrate sent people to collect taxes and deliberately made things difficult for the people. Many people, unable to bear the pressure, had to send gifts to bribe the officials. Although Li Qing's family was poor, he resolutely refused to send gifts. The county magistrate became furious and threw him into prison. In prison, Li Qing was not intimidated; he still maintained his noble character and insisted on his principles. Finally, he was released from prison. People praised his noble character of self-respect and regarded him as a role model. Li Qing's story has been passed down to this day and has become a model for people, encouraging them to maintain their purity in the face of various temptations, not to collude with evil forces, and to be an upright gentleman.
Usage
用于劝诫人们保持自身的纯洁，不与邪恶势力同流合污。
Used to admonish people to maintain their own purity and not to collude with evil forces.
Examples
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他为人正直,洁身自爱,从不与那些为非作歹的人同流合污。
tā wéirén zhèngzhí, jiéshēn zì'ài, cóng bù yǔ nàxiē wèifēi zuòdǎi de rén tóngliú héwū.
He is honest and self-respecting, never colluding with those who do evil.
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李明洁身自爱，从不参与那些不正当的活动。
lǐ míng jiéshēn zì'ài, cóng bù cānyǔ nàxiē bù zhèngdàng de huódòng.
Li Ming is clean and self-loving, never participating in those improper activities.