Li Xiaohong, female, is currently an associate professor at the Institute of Analytical Chemistry of Soochow University and a tutor for master students. In 2004, Peking University graduated with a bachelor's degree and studied under Professor Zhang Xinxiang. 20 1 1, university of akron, USA, with a doctorate in chemistry. The tutor is Professor Peter rinaldi. Multidimensional liquid NMR method is designed to effectively characterize the chemical structure of polymer materials. In 2009, he was awarded the Nuclear Magnetic Resonance Award (NMR Award) by Dr. G.E. Wilson and M.P. Wilson from Ohio, USA. 20 10 was awarded the national "Outstanding Postgraduate Award in Polymer Science" by the National Chemical Society of San Francisco, USA. 20 10 was invited as the chairman of the postgraduate and postdoctoral branch of the international small molecule nuclear magnetic conference (SMASH) and made a report to the conference. In September, Portland was appointed as a distinguished associate professor and tutor of Suzhou University, and the director of the Nuclear Magnetic Center of the Analysis and Testing Center of Suzhou University. In the same year, he was hired as a member of the Nuclear Magnetic Professional Committee of Jiangsu Analytical Testing Association. The following year, he served as deputy director of the nuclear magnetic professional Committee of Jiangsu Analytical Testing Association. The designed NMR method is accurate and effective in judging the molecular chain end and branching structure, which is especially important for revealing the reaction conditions and mechanism of polymer polymerization. The extensive validity of this method has been confirmed in the structural determination of many polymer samples.