Mao-Hong Yu is a professor at the State Key Laboratory for Strength and Vibration of Mechanical Structure at Xi’an Jiaotong University, Xi’an, China. His scientific research is concentrated on the strength of materials and structures including the metal, rock, soil, concrete, plasticity, geo-mechanics and mechanics of materials, etc. The unified strength theory has won the National Natural Science Awards in 2011 which is the highest award in China.