An exhibitor displays Weenie Bear printed by a 3D printer at China Beijing International Fair for Trade in Services (Beijing Fair) in Beijing, capital of China, May 29, 2013. (Xinhua/Zheng Yong)

An exhibitor displays a 3D printer model at China Beijing International Fair for Trade in Services (Beijing Fair) in Beijing, capital of China, May 29, 2013. (Xinhua/Zheng Yong)