Yin Yang pond in the park show the peace to people's mind. The Yin Yang building or Yin Yang pond must be built around Chinese community. If you see that, then it should have many Chinese around.
Tai-Chi Yin Yang Pond
Yin Yang Pond in the park
Yin Yang Building
Yin Yang Symbol can be drawn by circles. The Circle is very balance - it has equal distance from the center to the edge. The Balance means stable. There is no intention for a circle to fight outside object. Every point on the surface of the circle is hardest point of the circle. That means the circle provide the best protection. Combing these factors, the Circle is the most peaceful object.