Abstract: This article is composed based on the narrative by Professor Liu Lin from the School of Astronomy and Space Science at Nanjing University, detailing his academic achievements, experiences, and insights. The first section provides a brief introduction to Professor Liu Lin, outlining his journey from growing up and studying to becoming a leading authority in the fields of celestial mechanics and spacecraft orbital mechanics in China. The second section comprehensively introduces Professor Liu Lin's academic accomplishments. Since the early days of China's aerospace development, Professor Liu has conducted research on satellite orbital theory, participated in numerous missions and projects, and applied his relevant achievements within them. As an expert in celestial mechanics, he has also carried out extensive research and achieved results in the field of small bodies dynamics. With China's advancement in deep space exploration, Professor Liu has been involved in research and feasibility studies related to China's lunar and Mars exploration programs. The third section highlights Professor Liu Lin's achievements over more than 50 years in his role as an educator. He has dedicated his life to teaching and educating young scholars, who have flourished in various fields. In the fourth section, Professor Liu Lin shares his experiences and insights from over 50 years of dedication to teaching and research. He passes on his wisdom to younger generations in the fields of scientific research and education, covering aspects such as work methods, attitudes, and work-life balance.