Map of the Yangtze Plate and its neighbouring plates (in French
The Yangtze Plate, also called the South China Block or the South China Subplate, comprises the bulk of southern China. It is separated on the east from the Okinawa Plate by a rift that forms the Okinawa Trough which is a Back arc basin, on the south by the Sunda Plate and the Philippine Sea Plate, and on the north and west by the Eurasian Plate. The Longmenshan Fault on the latter border was the site of the 2008 Wenchuan earthquake.
The Yangtze Plate was formed by the disaggregation of Rodinia Supercontinent 750 million years ago, in the Neoproterozoic era. In Triassic the Yangtze Plate collided with the North China Plate and formed the Sichuan basin. In Cenozoic the Yangtze Plate was influenced by the collision of the Indian and Eurasian plates creating the uplifting of the Longmen Mountains. Its southward motion is accommodated along the Red River fault.
Bird, P. (2003) An updated digital model of plate boundaries, Geochemistry Geophysics Geosystems, 4(3), 1027, doi:10.1029/2001GC000252.