In the research seminar on April 6, 2023, Prof. Yufan Li from the Chinese University of Hong Kong presented his research on the observation of flux quantization in topological superconductors. This seminar highlighted the unique physical properties of topological superconductors and new experimental methods for their identification. Prof. Yufan Li is currently an Assistant Professor in the Department of Physics at the Chinese University of Hong Kong. Before this, he worked as a postdoctoral researcher at Johns Hopkins University from 2013 to 2021. During his stay there, he collaborated with Prof. Nakatsuji and Dr. Higo on thin film. fabrications.