My project proposes to rebuild the old city wall of Beijing as housing. I envisioned the wall as a series of frames whose structure is derived from Chinese house plans. The plan/section flip is borrowed from traditional Chinese architecture, where the plan may work in section as well ( one ascends vertically as one passes through successive walls). The frames provide a vertical foundation, and would accomodate a large number of houses which could be built incrementally, much as the traditional fabric grew over time. I have demonstrated five possible houses in the large model: the horizontal house, the vertical house, the bridge house, the connecting house, and the wrapping house.