Volunteers from Lanzhou University of Technology help deaf students make origami at Lanzhou School for the Blind, Deaf and Dumb in Lanzhou, capital of northwest China's Gansu Province, Dec. 4, 2012, a day ahead of the International Volunteer Day. The International Volunteer Day, which falls on Dec. 5 every year, is an international observance designated by the United Nations since 1985. (Xinhua/Huang Wenxin)