Who should I find to deal with the advertisement that the property installed in the elevator privately?

Legal analysis: as long as the property installs advertisements in the elevator privately, as long as the contract does not explicitly prohibit it, some advertisements can be made without damaging the elevator equipment, affecting the use of the elevator and issuing various prohibitions prohibited by the state. The advertising fee charged for playing advertisements in elevators in residential areas belongs to the owner. Only some elevators are used for advertising, and the advertising income belongs to the residents of the building number to which the elevator belongs. If the elevators in the whole community are advertised, the income will be owned by all owners.

Legal basis: Article 282 of the Civil Law of People's Republic of China (PRC), the income obtained by the construction unit, the property service enterprise or other managers from the owner's part shall be owned by the owner after deducting reasonable expenses.