According to the basic comception of tectostratigraphy

the author divided the Meso-Cenozoic Systems in East China into six tectonic-sedimentary cycles and proposed that the Lower Eogene should belong to Upper Cretaceous

Upper Triassic to Lower Jurassic in South China and the Nanyang Basin to Cretaceous.An important tectonic generation in the end of Jurassic is significant in dividing the tectonic evolution history into two stages

that is

Triassic-Jurassic stage and Late Cretaceous-Tertiary stage.Two huge tectonic sys-tems that developed in the stages derived from the same origin but different from each other.Extensive tectonic uncomformities could be found between the tectonic systems

thus resulting in two dimensional feature of Meso-Cenozoic Systems in East China.