What do you mean by hanging six bronze bells next door? Bad for my family?

This statement is unscientific, and there is no scientific basis to prove that two bronze bells will have a bad influence on your home.

Hanging bronze bells on neighbors' doors is a folk custom, which may represent auspiciousness, peace and happiness. This custom has no scientific basis and has not been scientifically confirmed.

So believe in science and facts, and don't be overly superstitious and worried. If you are dissatisfied with your neighbor's behavior, or are worried that it will affect you, you can communicate directly with each other and seek a reasonable solution.