On the afternoon of April 27, the research group invited associate professor Lei Wang,  Nanjing Tech University , to give a special lecture on the resolution of the fine structure of crystals. The lectures mainly focus on the fundamentals of crystallography, instrument analysis, Topas software introduction, code programming, structural refinement and separation. By virtue of his rich experience and experience, Mr. Wang actually operated a number of cases.  Through this lecture, the students have systematically learned the relevant knowledge of structural analysis, and have a more intuitive and clear understanding of structural refinement and separation.