The expansion of many political controversies is a change in the relationship between public and private life, which helps shape the development model of modern society. In the 20th century people began to pay attention to the power of the state and the market, which overwhelmed private life. In the 21st century, the social problem has gradually changed, and the domestic process of the private sector has been regarded as the loss of public life. There is a clear boundary between the public sphere and the civic sphere, which is the key to modern imagination and changes to structural customs, discourse, institution.
Privately owned public spaces, also known as private public spaces (POPOS), are open to the public, but are public spaces owned by private groups (usually commercial real estate developers). The transformation from public public space to private public space is called privatization of public space and is a general result of urban reconstruction. Since around the 1960's, privatization of public spaces has been criticized by civil society organizations such as the Open Space Association (especially in urban areas). Private-public partnerships manage the parks and playgrounds extensively through the establishment of protection groups that can not be managed by public institutions. Corporate sponsorship in the public recreation field is everywhere and provides open spaces for the public in exchange for higher air rights. This is good for building a tall building with a private park
Public space is a social space that is usually open and available to people. Roads, public plazas, parks, beaches are often considered public spaces. Publicly open government buildings such as public libraries are public spaces. Although it is not considered as a public space, private property buildings and property seen from sidewalks and public roads may affect public landscapes such as outdoor advertisements. Private space is the place where people live, I think that this is their psychology. When their personal space is infringed, most people place emphasis on their personal space and feel uncomfortable, angry, or anxious. It is an indicator of relationship between people and people to allow people to enter a private space and enter other people's personal space. The hotel offers privacy to lovers, children, close families.