Speaker Zhang Jiaqi is a doctoral student studying in the thermal energy, Department of mechanical engineering, Tianjin University, China. The main research contents are the extraction of middle and deep geothermal energy, geothermal heating and power generation. At present, one SCI paper, one EI paper and several international conference papers have been published. The research results mainly include the application of medium and deep geothermal double pipe heat exchanger system in China's heating and the potential analysis of China's geothermal resources in power generation. The research results provide effective technical support for geothermal power generation and heating in various regions of China.