The project is located in Nanjing. The positioning of the project is to create an international open community. The project base is located in the underground space.The project base is surrounded by mountains. The designer, inspired by the shape of the rolling hills, creates the surficial landscape which extends down to the visual surface of the building. It connects the surficial and underground space.The community centre, as a place for exchanges and gatherings, can promote family relationships and neighbourhood relationships.