Beijing Olympics just keeps on giving

Tai Chi fans perform in front of the Bird Nest, also known as the National Stadium, in Beijing, on Aug 8, 2009.[Photo/Xinhua]

At the Beijing Olympic basketball Gymnasium, the audience cheers for the Beijing Ducks Basketball team during the fourth round competition of 2011-2012 CBA finals in Beijing, on March 28, 2012. [Photo/Xinhua]

Turandot, an opera directed by Zhang Yimou, puts on its first show at the National Stadium in Beijing, on Oct 6, 2009. [Photo/Xinhua]

Young competitors start during the National Children's Swimming Competitions and Beijing Amateur Swimming tournaments held at the National Aquatics Center, also known as the Water Cube, in Beijing, on Dec 4, 2010. [Photo/Xinhua]

Competitors cheer before they start a running race at the Olympic Green, an Olympic Park constructed for the 2008 Summer Olympics, in Beijing, on Aug 22, 2010. [Photo/Xinhua]

A large-scale photography exhibition of the Beijing 2008 Olympic and Paralympic Games "a Marvelous Ceremony" is unveiled at Olympic Green in Beijing, on Aug 8, 2009. [Photo/Xinhua]

People picnic at the Beijing Olympic Forest Park in Beijing, on Oct 2, 2011. Beijing residents have more choice of places to exercise or entertain thanks to the constructions made during the 2008 Olympics. [Photo/Xinhua]

The historic Bell and Drum Tower set against a blue sky and white clouds in Beijing, on July 31, 2011. Since the 2008 Olympics, Beijing has taken various measures to reduce the air pollution and focus on environment protection. [Photo/Xinhua]

An elderly volunteer gives directions to passengers at Dongzhimen, a transport station in Beijing, on April 27, 2011. Beijing gets plenty of intangible heritages from hosting the Olympics, including the Chinese sports spirit and the memory of hosting a world class event and team involvement for those who participated as volunteers. [Photo/Xinhua]

Passengers queue for check-in at the Terminal 3 of the Beijing Capital International Airport, on Jan 28, 2012. Infrastructure has developed rapidly in Beijing since the Olympics. [Photo/Xinhua]

Passengers at the Beitucheng subway station on Line 8, which was constructed just for the Olympics, in Beijing, on April 18, 2012. [Photo/Xinhua]