Abstract
Emphasis is placed on geological structrure of the East China Sea and its oil and gas-bearing properties.Discussed first are geomorphic and geophysical features of the East China Sea and history of its evolution,and then divition of,and discussion on,geotectonie units are made on the basis of comprehensive regional investigation carried out by Bureau of Marine Geology,Ministry of Geology and Mineral Resources.Finally,oil-and gas-bearing properties are dealt with and principal points for oil and gas exploration are also suggested.