**8. Discussions and conclusions**

Through the regional correlation of the lithofacies within different depositional systems, this chapter proposes a high-resolution stratigraphic framework, including 2 long-term base level cycles, 6 middle-term base level cycles, and more than 58 short-term base level cycles.

The base level fluctuations are mainly controlled by the regional tectonic setting. Active subsidence stages tend to make base level rising semi-cycles, while relative stable stages tend to make base level falling semi-cycles.
