This is a saying that has been circulating for hundreds or even thousands of years. Its original words are "no windtight fence". Modern people call it a wall.
If you want people to know, you must do it yourself. If you don't want others to know what you have done, you'd better not do it.
Common saying source
The word "proverb" first appeared in Sima Qian's Biography of Historical Records and Funny Stories in the Western Han Dynasty in China. Take Chu's article Ximen Bao Ruling Ye as an example: "People say that' if you don't marry Hebo, the water will float far away and drown its people' clouds." The word "proverb" here refers to popular saying.
Later, Liu Xiang quoted Lu Wen's letter to Xuan Di in Shuo Yuan Gui De and Ban Gu's Han Shulu's Biography.
The formal use of "proverbs" refers to popular, vivid and widely circulated stereotypes among the people: "So there is a saying:' It is impossible to paint a place as a prison; For official woodcarving, the period can't be right. "This is the wind of illness." ("Guide to Telling the Garden")
"So, as the saying goes:' It is impossible to draw the ground as a prison; Now is not the time to carve official wood. "This is the wind of illness." ("Lu Han Wen Shu Chuan")