People want to seek the feeling of nature in the noise of the city. The large flow of people at the entrance and exit of the subway station is also our main solution. During the day, construct the feeling of simulating the shadow projection in the forest. Through the change of multi-level and different directions, the light projection is more colorful. At night, the outer skin of the subway building absorbs sunlight during the day and shines at night to create the feeling of starry sky. It also gives people who work overtime in the city and go home late to relax.