Tennis Center Introduction: The Tennis Center covers an area of 16.68 hectares, with a total construction area of 26,514 square meters, and a total of 10 competition venues. It is the only building that uses concrete in its natural state as an exterior surface without any decoration. Approximately 30,000 square meters of concrete "dressing" maintains the original flavor of the building. The true color and texture of fair-faced concrete are in line with the surrounding atmosphere, reflecting the harmonious beauty of architecture and nature, and integrating with the artistic conception of the Olympic Forest Park. The central court is the final venue of the tennis match. It is the largest of the three "flowers". It has 48 cast-in-place reinforced concrete cantilever beams with an inclination of 42 degrees. The slant length is about 17 meters, and the weight of a single beam reaches 62 tons. .