Hou Xun, born in Xianyang, Shaanxi province in December 1936, is a famous expert in Optoelectronics. He has been engaged in the theoretical and technical research of Photocathode, Optoelectronic Technology and Fast Optoelectronic Devices, and has an important influence in the field of Transient Optics and Optoelectronics. In 1985, he won the National Science and Technology Progress Award as a major contributor in the program “Dynamic Optical Observation and Measurement Technology in Modern National Defense Tests”. Hou Xun is the chief scientist of femtosecond laser technology and ultra-fast process research, a project of China’s “Eighth Five-year” Climbing Plan and is one of the conveners of the expert committee of the pre-selected project of China's “Ninth Five-year” Climbing plan: Research on The Strong Field Laser Physics and Femtosecond Super-fast Process. Since 1986, he has won two second prizes, three third prizes, one third prize for national invention, three first prizes and four second prizes for Scientific and Technological Progress of the Chinese Academy of Sciences. Also, he has won the second prize and the third prize of Science and technology progress of Shaanxi Province. He has published more than 190 papers in important journals and academic conferences at home and abroad, and made special presentations at the 18th and 23rd International High-speed Photography Conferences and the first International High-speed Photography Conference in Japan. Academician Hou Xun proposed and built the “State Key Laboratory of Transient Optics Technology”, which makes an important contribution for the research of China's transient optics technology to catch up with the world’s advanced level. The following are his achievements: he has been awarded the title of “Young and Middle-aged Expert with Outstanding Contributions” in 1984, the title of “National Advanced Worker” in 1989, elected as an academician of the Chinese Academy of Sciences in 1991, won the first prize of Guanghua Science and Technology Foundation in 1996, and won the He Liang He Li Science and Technology Progress Award in 1999.