1. The Concept of Key Economic Area and its Relation to Public Works for Water-Control 2. Geographical Basis of Water-Control and Economic Regionalization in China 3. A Statistical Study of the Historical Development and Geographical Distribution of Water-Control Activities 4. Origin of Water-Control as an Economic Function of the Chinese State 5. The Loess Region and Central Huang Ho Basin as Key Economic Area 6. The Transition from the Huang Ho Basin to the Yangtze Valley 7. The Economic Domination of the Yangtze Valley.