Abstract: During Neoproterozoic to Early Paleozoic, the South China was a marginal basin captured by the Yangtze active continental margin, filled with huge thick flysch, sandstone, and shale sediments. At the end of the Early Paleozoic, the Fujian coast arc collided with the Wuyi arc and then both of them collided with the active continental margin of the Yangtze Block, which was so-called an orogeny of the South China. These resulted in the metamorphism of the marginal basin sediments of the South China and intense tectonic deformation, then formed a series of nappe structures and granite magmatism. Accordingly, the South China was an Early Paleozoic orogenic belt instead of the Cathaysian Block (Paleocontinent). However, as there still have some scholars continue to use this old term(the Cathaysian Block), it brings on the argument that the South China is an orogenic belt or the Cathaysian Block. Professional term reflects scholars’ academic ideology and research direction, therefore it is necessary to discuss the tectonic property of the South China. This paper discusses some problems of the Cathaysian Block and briefly points of the nomenclature about geologic structural units.