Violation of law, discipline, breach of contract and violation of public order and good customs are different concepts and hierarchical relationships. Strictly speaking, it is illegal to sell cooked food in a residential area without approval and business qualification, but when it does not cause harm and damage, it can be said that it violates administrative regulations or the management order of residential areas. But don't say it's illegal. If it violates the regulations of community management and operates without a license, it is also appropriate for the corresponding organs or organizations to manage it.