Sesame River Park in the suburb of Nanjing city is an important green open space for surrounding residents. In order to vivify the ordinary life and provide a public space for the community, this little white building has its right to be unique compared with other service facilities. A geometrical order of irregular quadrilaterals and triangles can be drawn from the context of the park where the community center is located, so that the basic form of the building is created. The building and the slops of greenery surround the square, defining its impression of space and dynamic atmosphere. The landscape of the park will be renovated together in the same geometrical order.