If people don't know, don't do it
If you don't know it, you can't do it unless you do it yourself. As a common saying goes, the pronunciation is Ru ò y à or é Nb ù zh ī, CH ú f ē ij ǐ m ò w é I. It means to think that others don't know what they're doing unless they don't do it. A bad thing must be exposed after all. The saying comes from Mei Cheng's Shangshu Jianwu Wang in Han Dynasty: "if you want people not to hear, don't say; if you want people not to know, don't do."
Explanation of phonetic notation
If you don't know it, you can't do it unless you do it yourself. The saying "Ru ò y à or é Nb ù zh ī, CH ú f ē ij ǐ m ò w é i " is included in the old Zengguang Xianwen. It is also a well-known word. Teaching children, students, criminals and so on are used a lot. Persuasive, concise words. But we should also be careful when using it. If it is used improperly, it is easy to arouse people's disgust.
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"If you want people not to hear, don't say; if you want people not to know, don't do." Chapter 71 of Shi Yukun's three heroes and five righteousness in the Qing Dynasty: as the saying goes, "if you want people to know, don't do it unless you do it yourself." When Ni Taigong got this son, it has been known for a long time.
If people don't know, don't do it
pay even for a horse 's drink of water -- extreme honesty - yìn mǎ tóu qián