On May 31, 2023, the research group started the doctoral dissertation defense, and we invited Academician Fang Weihai from the School of Chemistry of Beijing Normal University, Professor Jiang Ying from the Center for Quantum Materials Science of Peking University, Researcher Qiu Xiaohui from the National Center for Nanoscience and Technology, Researcher Wang Dong from the Institute of Chemistry, Professor Su Hongmei and Professor Zhu Chongqin from the School of Chemistry of Beijing Normal University as members of the defense committee, among which Professor Qiu Xiaohui is the chairman of the defense committee. Yang Pu defended his doctoral dissertation, and the defense committee unanimously decided that Yang Pu passed the defense.