"Mainland China" is a term commonly used to refer to the People's Republic of China, excluding Hong Kong, Macau, and Taiwan. However, there are other expressions that can be used as synonyms for this term. For example, "continental China" emphasizes the physical aspect of the country, being located on the Asian continent. "Interior China" conveys the idea of the heartland of the country, where most of the population resides. "Mainland Asia" could also be used to indicate the largest landmass in the world. Whatever term chosen, it is important to use it accurately and respectfully when referring to this powerful nation.