2.Current status and main features Land subsidence in China was initially found in Shanghai and Tianjin in the 1960s.Shanghai and Tianjin were the two largest industrial cities in China.The governments did substantial preventive and remedial measures to control subsidence.At present,these initial land subsidence have been basically controlled.Field measurements indicated that the initial subsidence areas were experiencing little subsidence or were in a stage of rebound in Shanghai (Liu,1998a).2. Current status and main features Land subsidence in China was initially found in Shanghai and Tianjin in the 1960s. Shanghai and Tianjin were the two largest industrial cities in China. The governments did substantial preventive and remedial measures to control subsidence. At present, these initial land subsidence have been basically controlled. Field measurements indicated that the initial subsidence areas were experiencing little subsidence or were in a stage of rebound in Shanghai (Liu, 1998a)