The project focus on a continuous old wall, which separates the site into two, as the “Spolia”. According to the research on both previous and present urban pattern of the neighborhood, the value of the wall is reflected: it is one of the few remnants of the buried river and a defining character in the sites social manifestation. As a result of interactions with the differing segments of wall, it was renovated again and again and the qualities are variant. The wall acts as connection and separation, nature and built environment, protection and orientation, closure and openness. The intention of the master plan is to create a community oriented block, with the wall connect the newly added public facilities and form a linear landscape run through the whole block, thereby inverting the space along the wall from “back” to accessible “front” to serve the residents living in the neighborhood. The architectural program in the master plan is a public building that consists of a library and a sports center. The meaning of a street corner is also taken into consideration due to the site location. The corner building, works as an entrance of the linear “wall” space. Following the alley along the wall from a street corner, a vivid “front”, represents both a spiritual core of history and cohesion of the neighborhood.