The most widely used variety of Chinese spoken in Sichuan is Sichuanese Mandarin, which is the lingua franca in Sichuan, Chongqing and parts of Tibet Autonomous Region. Although Sichuanese is generally classified as a dialect of Mandarin Chinese, it is highly divergent in phonology, vocabulary, and even grammar from Standard Chinese.[74] The Minjiang dialect is especially difficult for speakers of other Mandarin dialects to understand.[75][76][77][78]