Mainland China

Mainland China, Continental China, or simply the mainland, is a geopolitical term usually synonymous with the area that is culturally and economically associated with the territory of the People's Republic of China (PRC), usually excluding the Special Administrative Regions (SARs) of Hong Kong and Macau. The term also never includes Taiwan, which is claimed by the PRC, but is currently under the jurisdiction of the Republic of China (ROC). The term in the Chinese language may or may not include Hainan Island, which is geographically separate. In Taiwan, Hong Kong, and Macao, the term is a politically neutral method of referring to the Mainland region.
In English speech and writing, the distinction is not always made, and a reference to "China" is often an implicit reference to mainland China, at the exclusion of Taiwan. This usage of the term "China", however, is often more flexible with the inclusion of Hong Kong and Macao. (See article on China for details).

source: http://en.wikipedia.org/wiki/Mainland_China