This project is a combination of porosity and city. In the modern high-pressure life, people are under pressure from work, and gradually become depressed, and their boring life day after day. Skyscrapers rise from the ground in the city, and the urban space is repeatedly squeezed. The social background is very similar to the Renaissance. Thinkers in the Renaissance proposed romanticism, hoping that people will return to nature and childhood. Based on this theory, this project hopes to develop the urban air space to increase the porosity of the city. The air space allows people to shuttle between different corners of the city. Unlike the squeezed land space, the air space is interesting and fresh. This project includes sky corridors, sky gardens and sky slides using hovercraft as a means of transportation. With these facilities, people can release stress, get close to nature, and return to childhood.