Mobius ring in a vertical cityUrban fringe is a special area with harsh environment and emerging problems formed in the process of rapid urbanization. It is the space carrier for the transition, integration and conflict between urban and rural social systems. Not only is there no living space for animals, but the residents also live in a low-quality sandwiched life. Based on the concept of integration and circularity of mobius ring, the design constructs a sustainable system in the site by usin