On the afternoon of June 11, the research group held a structural refinement software exchange and learning meeting in Hongyi Building D601 conference room. At the beginning of the conference, Teacher Zhou Yu introduced the principle, method and related application of crystal structure analysis. Subsequently, Meng Biao, a doctoral student, introduced crystallographic principles, data acquisition, Topas software, programming, and structural refinement, and shared his experience and experience in crystal structure analysis. During this period, Teacher Zhou Yu and the students discussed and exchanged relevant contents with Meng Biao. Through this meeting, the students had a clearer understanding of the crystal structure analysis, and the exchange and learning meeting was successfully completed.