The designer uses the first diagonal line - the diagonal line cut inside the bottom of the main building. It forms the most basic scale and character of the inner street, and The second diagonal line cuts off the ends of the multi-storey building, making the original interface towards the center of the green which is slightly dull to be layers retreats paralle to the green axis.
After establishing the form, the design also adopts the rounding treatment at the corners of the building to establish a dialogue with the north-facing buildings.