2.Current status and main features On the other hand,many median-size cities such as Cangzhou,Suzhou,Wuxi,Changzhou,Fuyang and An'yang are in the initial state of rapid development of land subsidence.The annual subsidence rate can be 50- 100 mm (Duan et al.,1993;Duan,1998).These median- size cities are the emerging industrial cities.The land subsidence in these cities is expected to continue and increase mainly because the rapid expansions of industrialization and urbanization in those cities would continue for another decade. 2. Current status and main features On the other hand, many median-size cities such as Cangzhou, Suzhou, Wuxi, Changzhou, Fuyang and An’yang are in the initial state of rapid development of land subsidence. The annual subsidence rate can be 50– 100 mm (Duan et al., 1993; Duan, 1998). These median￾size cities are the emerging industrial cities. The land subsidence in these cities is expected to continue and increase mainly because the rapid expansions of industrialization and urbanization in those cities would continue for another decade