Prof. Liu Bo is from Institute of Optics and electronics, CAS. He is the deputy director of Key Laboratory of Space Optoelectronics Precision Measurement Technology, CAS, also the member of teaching Committee of School of Optoelectronics, University of Chinese Academy of Sciences, and keynote professor. Liu has been serving as a Lidar Scientist of the University of Wyoming (USA), responsible for the on-board atmospheric detection Lidar systems on the KingAir aircraft. Liu has led and completed various research and development projects related to lidar systems. Currently, his main focus is on long-distance single-photon detection and active-passive composite detection.