Sichuanese, also called Sichuanese Mandarin, is a branch of Southwestern Mandarin spoken mainly in Sichuan and Chongqing, which was part of Sichuan Province from 1954 until 1997, and the adjacent regions of their neighboring provinces, such as Hubei, Guizhou, Yunnan, Hunan and Shaanxi. Although "Sichuanese" is often synonymous with the Chengdu-Chongqing dialect, there is still a great amount of diversity among the Sichuanese dialects, some of which are mutually unintelligible with each other. In addition, because Sichuanese is the lingua franca in Sichuan, Chongqing and part of Tibet, it is also used by many Tibetan, Yi, Qiang and other ethnic minority groups as a second language.
Sichuanese is more similar to Standard Chinese than southeastern Chinese varieties but is still quite divergent in phonology, vocabulary, and even grammar. The Minjiang dialect is especially difficult for speakers of other Mandarin dialects to understand. Sichuanese can be further divided into a number of dialects: Chengdu–Chongqing, Minjiang, Renshou–Fushun, and Ya'an–Shimian. The dialect of Chengdu, the capital of Sichuan province and an important central city, is the most representative dialect of Southwestern Mandarin and is used widely in Sichuan opera and other art forms of the region.
