Sien Li, Professor and Doctoral Supervisor, is a winner of the National Natural Science Foundation of China's Outstanding Youth Science Fund Project. He graduated from the Department of Agricultural Water Conservancy Engineering of China Agricultural University in June 2004 and received a bachelor's degree in engineering. In the same year, he studied in the Department of Agricultural Water and Soil Engineering of the same school and received a doctorate in engineering in June 2009. After graduation, he stayed at the school to engage in scientific research, teaching and management. He is currently the deputy director of the National Field Scientific Observation and Research Station of Wuwei Oasis Agricultural Efficient Water in Gansu Province, and the deputy director of the Shiyang River Experimental Station of China Agricultural University. His research interests mainly focus on theories of hydrothermal carbon and nitrogen transport in the soil-plant-atmosphere continuum, farmland ecological and hydrological processes and simulations, agricultural hydrometeorology, and new technologies and theories of irrigation and drainage.