Although Mandarin Chinese is shared by Chinese communities such as Mainland China, Taiwan, Hong Kong, and Singapore, linguistic differences are frequently found among regional uses, ranging from pronunciation, orthography, vocabulary, grammar, and discourse. Along with the increasingly recognized notion of “World Chineses” in recent years, the study of the regional variations has also become more linguistically, socially, and culturally significant. Such a study facilitates more efficient communication among speakers of different varieties, reflects the social and cultural differences of the Chinese speaking communities from a linguistic perspective, and contributes to the theoretical discussion of language variation and change. With specific examples of the linguistic features exhibited in Mainland China, Taiwan, Hong Kong, and Singapore Mandarin Chinese, this chapter is an overview of the current studies, methodologies, and motivations of variation
