Chengdu-Chongqing dialect (simplified Chinese: 成渝话; traditional Chinese: 成渝話, Sichuanese Pinyin: Cen2yu2hua4, local pronunciation: [tsʰən˨˩y˨˩xua˨˨˦]), named after the two largest cities in Sichuan: Chengdu and Chongqing, is the most widely used branch of Sichuanese with about 90 million speakers. It is spoken mainly in North and East Sichuan, the northeastern part of Chengdu Plain, several cities or counties in southwestern Sichuan (Panzhihua, Dechang, Yanyuan, Huili and Ningnan), Southern Shaanxi and Western Hubei.
This uniform dialect is formed after the great migration movement in Ming and Qing dynasty, and is greatly influenced by the immgrants' languages (mainly Southern Proto-Mandarin from Hubei, Xiang and Gan). So it keeps fewer characteristics of Sichuan's original Ba-Shu Chinese than other Sichuanese dialects, such as Minjiang dialect.
- ^ 李蓝（2009年第1期），《西南官话的分区（稿）》，方言