WEIFANG, CHINA - JULY 24: Overweight students exercise in a gym during a weight-loss summer camp on July 24, 2009 in Weifang of Shandong Province, China. China saw a growing number of diabetics amongst children and adolescents in its major cities, approximately 12 percent of whom were found to be obese, according to a report released in 2008 by Ministry of Health.