By summarizing and reflecting on the courses and studios taken during the three semesters at Cornell, this booklet explores interface studies in urban renewal. How to design interfaces, and how could architects think about pre-design and post-design? This thesis argues that the designers should engage the public and leave room for the public to exercise their autonomy. It is also essential to weigh the interests of multiple parties and to balance the level of participation of each group. Moreover, it is crucial to choose the appropriate scale and materials regarding the design approach, because they affect the spatial perception. The interface is a spatial sequence that reflects the urban renewal process, and therefore, its representation will also influence the public's perception of urban space.