What must be done to select a property service enterprise by bidding?

New commercial residential areas must employ property service enterprises through bidding. The state encourages the construction unit to select and employ property service enterprises with corresponding qualifications through bidding. The project of selecting and hiring property service enterprises through bidding is only aimed at newly developed houses and non-houses in the same property management area. Newly developed non-residential projects, as well as the situation that property service companies are selected by the owners' congress after the owners move in, can be invited by bidding or other means.