Smart cities are usually defined as new cities connected to IT technology, but XnTREE seeks to approach smart cities from a different perspective. Above all, we believe that the priority of a smart city is to create a foundation for the city's continued growth and development. In order to make this a reality, it is more important than anything else to create an environment where the active participation of residents based on diversity and the innovative technology of small and medium-sized businesses and startups can be actively reflected. Therefore, rather than constructing artificial new cities, it is necessary to transform the city to suit the new generation through urban regeneration. This is what XnTREE would like to focus on. This represents a combination of the city's new branding and technology and will become a driving force for constant change and development.