Divide the space with smooth curves, break through the rigid space boundary, cut the square structure inside the space with the circle, and then break the circle into curves .The reference of the circle comes from the design of the portal in the classical Chinese garden.The beauty of curve lies in its bending, its flowing and its myriad changes, which can give people the most intuitive visual enjoyment.As Oscar Niemeyer said“I am not attracted to straight angles or to the straight line, hard and inflexible, created by man. I am attracted to free-flowing, sensual curves”.