Combined photo shows the portrait of 75-year-old Cao Guiling (L) on Sept. 20, 2016 and Cao having a class of painting in the University for the Elderly in Tianjin, north China, Sept. 26, 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)
