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.