Can the early property contract be signed by the developer at will? After the house is sold, can the developer change the property company at will?

Before the establishment of the industry Committee and during the early property management, the main body of hiring property companies was indeed the development and construction unit. The development unit also needs to invite public bidding to hire a property company and file it with the property department. As for signing or changing at will, it should not be. First, the two parties will sign the preliminary property management contract, and the developer will also consider the reputation of the property, unless the property company defaults.