Centenarians to unveil secrets of longevity

102-year-old Chu Xiangfeng removes a soybean from its stalk in Xichang town of Hai'an county, East China's Jiangsu province, August 4, 2010. More than 40 writers will collaborate on the book The Centenarians in Hai'an, which features 62 centenarians of the county and will include information about their daily life such as diet, habits and how to have a long life. According to data from local public security authority, 99 old people aging more than 100 now live in the county, with the oldest at 106. [Photo/Xinhua]