Representatives from the three hosts - Guangdong, Hong Kong and Macao - raised their ceremonial torches to simultaneously light the official cauldron.
The "source flame" was extracted and ignited from combustible ice lying over 1,500 meters beneath the surface of the South China Sea in September.
China's 15th National Games will be held from November 9 to 21, while the 12th National Games for Persons with Disabilities and the 9th National Special Olympic Games will take place from December 8 to 15.
Source: english.www.gov.cn