What law did the residential property personnel violate when they beat the owners?

It violates the Civil Procedure Law, the Public Security Administration Punishment Law and the Public Security Administration Regulations, and most importantly, it violates the property service contract signed by the owner and the property management company. Generally, it is clear in the contract that the property management company serves the owner, and as the owner, it can take the form of litigation. Of course, the best way is to negotiate.