Professor Xu Guochang, state talent expert of China, head of Navigation and Remote Sensing Laboratory of HIT Space Institute, head of satellite remote sensing project, honorary professor of Southwest Jiaotong University, PhD supervisor of the French University Polynesia, Taishan scholar, was chief scientist of Qian Xuesen Laboratory of CAC, senior scientist of Geosciences Center Potsdam (GFZ) (1993-2014), adjunct professor of University Neubrandenburg, PhD supervisor of TU Berlin and GFZ, Lisbon University and Copenhagen University, editor-in-chief of the Springer book series of Sciences of Geodesy, adjunct professor of Chang'an University, Geodetic Institute Wuhan, National Time Service Center, Zhengzhou Surveying and Mapping Institute, South-East University, assessor of the Chinese Academy of Sciences (CAS) and Chinese Education Ministry, outstanding overseas scholar of CAS. Founder of Xu’s non-singularity theory, derived  Lagrange-Xu and Gauss-Xu equations of motion, founder of the navigation and remote sensing studying area of Shandong University at Weihai.