The Olympic Common Domain (OCD), located along the line of Beijing's historic Central Axis, remains the largest main venue in the history of the Olympic Games.
After the 2008 Olympic Games, Beijing encouraged famous domestic and foreign institutions and enterprises to jointly develop its Olympic venues and support facilities to stage sporting events and games, large exhibitions and artistic performances, realizing sustainable and efficient use of venues and facilities, while encouraging many cultural, sports, conventions and exhibitions, tourism and business industries to work together and to create a display window for the area's national image as a "World City test zone."
In the OCD, competition venues for Beijing 2008 Summer Olympic Games, such as the National Stadium (Bird's Nest) and the National Aquatics Center (Water Cube) have been operating well.
In 2011, the National Stadium received 2.53 million visitors. Eight large-scale performances and activities, each with audiences of more than 10,000, and more than 20 public-welfare activities were held there, among which audiences of the "30th Anniversary of Rock Records" and "Italian Super Cup" exceeded 80,000. The National Aquatics Center received 2.08 million tourists as 151 sports events and performances and 26 public-welfare activities were held there.
More than one million trees were planted in more than a dozen suburban parks in the area, which can absorb more than 70,000 tons of carbon dioxide and produce more than 50,000 tons of oxygen annually, making them green protective screens for Beijing and natural "oxygen bars" for its residents.
In the future, the OCD will become an international cultural exchange zone featuring Chinese culture and an Olympic cultural heritage landscaped area. It will strive to become a landmark of Beijing with global influence.