Dr. Li Tingyong 1997 was admitted to Southwest Normal University, majoring in geography. 200 1 graduated with honors and got the master's degree with the first place in the class. In September 2004, he entered the School of Geographical Sciences of Southwest University to study for a doctorate, and studied under the famous karst geologist Yuan Daoxian. Mainly engaged in the research of Quaternary geology, especially using the stable isotope indexes of carbon, hydrogen and oxygen in cave sediments and water bodies and the ratio changes of various metal elements, inferring the deposition mechanism of paleoclimate proxy indexes in cave sediments and discussing paleoclimate changes. Dr. Li Tingyong participated in the construction of the Geochemistry and Isotope Laboratory of Southwest University School of Geographical Sciences and the installation and debugging of instruments. From June 2005 to October 2005/KLOC-0 and February-March 2006, Dr. Li Tingyong was sent to the State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences (Xi 'an) to study mass spectrometry operation technology and complete some of his own experiments. Since April, 2006, Delta V Plus mass spectrometer, Kiel IV carbonate device, gas experimental platform, Conflow III and other equipment purchased by Southwest University School of Geographical Sciences have been delivered to the laboratory. Dr. Li Tingyong, combined with his own research work, is fully responsible for the daily operation and maintenance of Delta V Plus mainframe and Kiel IV carbonate plant, as well as the training of relevant experimenters. At the same time, I can skillfully operate the gas test-bed independently. In June, 2007, Li Tingyong received a doctor's degree in science, stayed in school, and was specially appointed as an associate professor. Continue to be responsible for the operation, maintenance, personnel training and daily management of geochemical and isotope laboratories. As an academic backbone member of the laboratory, he continued to study the Asian monsoon changes recorded by cave sediments. At the same time, we will continue to monitor the modern sedimentary process of Furong Cave in Chongqing, and explore the changing mechanism of geochemical indicators of cave sediments. In addition, he is also engaged in hydrochemical research in karst areas. In February 2008, he was hired as a master tutor.