Combined photo shows the portrait of 67-year-old Zhang Xuejun (L) on Sept. 20, 2016 and Zhang having a class of Tai Chi in the University for the Elderly in Tianjin, north China, Oct. 8, 2016. The University for the Elderly in Tianjin has 9 departments and provides various classes for a total of 26,730 aged students studying there. (Photo/Xinhua)
