Prof. Yingchun Liu, is a senior researcher at the Institute of Microsatellite Innovation, Chinese Academy of Sciences, and received her Ph.D. degree in astrometry and celestial mechanics from Nanjing University. As a doctoral supervisor in spacecraft design, she has participated in the Manned Space Flight Project, the Chang’E project and the Beidou-3 project, and now is the chief designer of the Beidou-3 satellite system (Chinese Academy of Sciences) and the deputy chief engineer of the two-type satellite system. She has won 1 first prize of the Shanghai Invention Award and 2 first prizes of the Ministerial Science and Technology Progress Award. She has published more than 60 papers and won the title of "Outstanding Contributor to China’s Manned Space Project" and the title of "Advanced Individual in the Construction of Beidou-3 Global Navigation Satellite System".