Mainland Chinese or Mainlanders are Chinese people who live in a region considered a "mainland". It is frequently used in the context of areas ruled by the People's Republic of China, referring to people from mainland China as opposed to other areas controlled by the state such as Hong Kong or Macau.

The word mainlander can refer to two different groups:

In the context of demographics of Taiwan, the term mainlander most likely refers to waisheng ren.

The translations of waishengren and benshengren into English poses some interesting difficulties. The usual English translation of waishengren is Mainlander, although many waishengren find this translation uncomfortable since it implies that waishengren are residents of mainland China, when they are all residents of Taiwan. Translating the term benshengren as "native Taiwanese" is also problematic because of confusion with Taiwanese aborigines. Most academic literature uses the terms waishengren and benshengren directly. The terms rarely come up in the English-speaking media.

China (ⁱ/ˈtʃaɪnə/; Chinese: 中国; pinyin: Zhōngguó; see also Names of China), officially the People's Republic of China (PRC), is the world's most-populous country, with a population of over 1.3 billion. Covering approximately 9.6 million square kilometres, the East Asian state is the world's second-largest country by land area, and the third- or fourth-largest in total area, depending on the definition of total area.

The People's Republic of China is a single-party state governed by the Communist Party of China. It exercises jurisdiction over 22 provinces, five autonomous regions, four directly controlled municipalities (Beijing, Tianjin, Shanghai, and Chongqing), and two mostly self-governing special administrative regions (Hong Kong and Macau). Its capital city is Beijing. The PRC also claims Taiwan—which is controlled by the Republic of China (ROC), a separate political entity—as its 23rd province, a claim controversial due to the complex political status of Taiwan and the unresolved Chinese Civil War. The PRC government denies the legitimacy of the ROC.

Hong Kong people (Chinese: 香港人) refer to people who originate from Hong Kong. The term (and its Chinese equivalent) has no legal definition in Hong Kong. Rather, terms such as Hong Kong permanent resident (香港永久性居民) and Hong Kong resident (香港居民) are used. Besides being used by Hong Kong residents, the term Hong Konger may be used by people who for one reason or another do not have legal residence status but spent an extensive period of time in Hong Kong or otherwise have a strong cultural connection with Hong Kong. Thus the term is largely open to personal interpretation. None of the terms make reference to the ethnicity of a person and are independent of Chinese citizenship or residency statuses.

The vast majority of Hong Kong Chinese have ancestral roots from Guangdong Province in mainland China. After all, the SAR had experienced a great exodus of people in the years leading up to the handover, and yet migration from mainland China in recent years have brought about migrants who would prefer to refer themselves as Chinese. Many locals however simply refer themselves as Hong Kong people (Hèung Góng Yàhn).