Feature: Former world champion brings Tai Chi into New Yorkers' life

Chen Sitan (L) and his wife Lin Xu perform at the 2nd Tai Chi competition in New York, the United States, Nov. 18, 2012. The ancient Chinese martial art Tai Chi has increasingly become a form of life for many New Yorkers, thanks to the efforts made by former world martial art champion Chen Sitan and his wife Lin Xu. (Xinhua)