Some people occupy or waste anything for their own benefit.

Destruction of public facilities, these acts infringe upon the legitimate rights and interests of others, and even seriously violate the law. Public life needs to be built and public interests need to be enjoyed.

Egoism is an interest closely related to oneself. For example, z-capital, promotion, reputation or the interests of your family and family. Everything that is closely related to oneself can be called self-interest. Once you have a conflict of interest with it, then you will spare no effort to safeguard it and try not to let it be infringed and lose it.