The Asian Games, officially known as Asiad, is a multi-sport event held every four years among athletes from all over the Asia. The Games were regulated by the Asian Games Federation (AGF) from the first Games in New Delhi, India until the 1982 Games. Since the 1982 they have been organised by the Olympic Council of Asia (OCA), after the break up of the Asian Games Federation. The Games are recognised by the International Olympic Committee (IOC) and are described as the second largest multi-sport event after the Olympic Games.
Thailand has hosted four Asian Games, more than any other nation, after twice having secured the Games from crisis. In its history, only nine nations have hosted the Asian Games. 46 nations have participated in the Games, including Israel, which was expelled from the Games after their last participation in 1974.
The 2010 Asian Games, also known as the XVI Asiad, are scheduled to take place in Guangzhou, China from November 12 to November 27, 2010. Guangzhou is the second city in China to host the Games after Beijing in 1990. A total of 476 events in 42 sports will be contested by athletes, making it the largest event in history of the Games. It will also be the last one to have presented such big events, as the Olympic Council of Asia (OCA) have enforced new hosting rules for future games, beginning with the 2014 Games.
source :http://en.wikipedia.org