Tong Zhengguo, 64, collects her bachelor's degree certificate at Hebei United University in Tangshan, North China's Hebei province, June 5, 2012. Tong began preparing for the college entrance examination in 2003 and was accepted by the College of Light Industry of Hebei United University in 2008. She also plans to take the entrance exam for postgraduate studies next year. [Photo/CFP]

Tong Zhengguo, a 64-year-old graduate at Hebei United University, poses for a photo during her college graduation ceremony, June 5, 2012. [Photo/CFP]