Based on studies of marine-erosion platforms

marine - built surface in Late Pleistocene Eopeh and elevations of apex underlying seashore facies sticky soil under the sand barrier etc

it’s recoginsed that the South China Sea high level and its north coastline is similar to that of present in second interglacial stage of about (2￣ 3) 104 a B. P. The costal landforms in the north of South China Sea is characteristic by the fact that the heights of marine-erosion platforms formed in Late Pleistocene Epoch and Holocene Epoch are similar

and the new and old sand barriers are close at hand and also have simllar heights. In general

the tectonic uplift and subsidence in the coasts of rock and barrier-lagoon are relatively stable

but delta coasts subside intermittently in same time.