Dr Liying Wang, Senior engineer of China Water Resources Pearl River Planning Surveying&Designing Co.,Ltd. She got her Ph.D. degree in engineering from the School of Water Resources and Hydropower Engineering of Wuhan University in 2007 and worked as a post-doc in the Scientific Computing Department of Florida State University during 2010 to 2012. As an engineer for more than ten years, Dr Liying Wang has experiences in water resources planning, polluted river treatment, groundwater modeling etc., and has a good knowledge of the water resources situation of the Pearl River Delta.