Dr. Dr. David S. Weis studied Health Economics and Medicine in Witten/Herdecke University. He received his PhD in Economics in 2016 and his Medical Doctor in 2019. Since 2004 he is frequently traveling to China. There he undertook part of the studies of this book while working for the Health Reform and Development Center of the People´s University in Beijing. Mr. Weis did his research for this book in German, English, French and Chinese, to provide a high quality output for the reader. This book reflects some of the various health economic interests of Dr. Dr. Weis - namely health system research and non-communicable diseases. Moreover, David Weis is a keen researcher on environmental health economics, with a special focus on water. Since 2014 he is working as an advisor for international organizations such as WHO, The World Bank, OECD and UNICEF.