Why are bells hanging on the tower?

I am a joke reader. I bought four or five China ancient joke books and two contemporary local joke collections. Except for some vulgar things, I think it is still full of wisdom and will never let you laugh it off. Although jokes are unpretentious things, they have never been highly valued by people, but they can help us talk about information, broaden our knowledge and gain wisdom. When I was a child, there was a Kuixing Building in the middle of our village, which was six stories high and had eight overhangs. There is an iron bell on each hanging wall, which jingles when the wind is out of date. I asked the old people, but I didn't ask why. Since then, I have been to many places, and almost all antique pavilions have such bells, but I have never paid much attention to this matter. I just feel that other bells are not as loud as those I heard when I was a child. Now I have a joke book on my desk, which is the one I wrote a few days ago. There is Guangxiao Fu, Fujian Straits Publishing House, 1987 edition, which is traditional and vertical. There is an article on Distinguishing Zhong You from Tudor in Guangxiao Fu, in which there is a sentence from Ai Zi's reply to Yingqiu people: "Every bird and magpie have many nests, and in a filthy place, Zhong You is hung on the tower to scare them away ..." I don't know whether Ai Zi's statement is in line with the original intention of the ancients to chime the bells, but I think it is very understandable and human, so it is very convincing.