Fig. 1

A one-courtyard Siheyuan (top left) and a three-courtyard Siheyuan (top right) in plan view and a three-dimensional three-courtyard Siheyuan model (bottom) (This figure is created by the authors using SketchUp).

A one-courtyard Siheyuan (top left) and a three-courtyard Siheyuan (top right) in plan view and a three-dimensional three-courtyard Siheyuan model (bottom) (This figure is created by the authors using SketchUp).