People have the need to sit or chat for a long time in the space. In this case, it is necessary to set up rest facilities, lighting facilities and green landscape in the space. At night, people need lighting when they move in the space to ensure the safety and convenience of activities. In summer, trees are needed for shade. At present, few in the dot - like space set up these pieces of facilities, the space slightly monotonous, not conducive to people for a long time to use.