Why can't the house in Madrid be sold?

The strength of developers is poor, property management is poor, and transportation and surrounding facilities are inconvenient. Buying a house depends on the strength of the developer. The stronger the developer is, the richer the development experience will be, the quality of the house will be guaranteed, and the design details of many residential buildings will be more humanized. The traffic is inconvenient, and the traffic problem was not considered in the early construction, so it is difficult to sell. These are the reasons why houses in Madrid can't be sold.