The Longdu dialect is a dialect of the Zhongshan Min division of Southern Min Chinese, located in the Dachong and Shaxi (formerly known as Longdu) area of Zhongshan in the Pearl River Delta of Guangdong. Despite its close proximity, Longdu is not very closely related to the surrounding dialects in the region, which belong to the Yue group. Its native speakers generally understand Cantonese, but not vice-versa. As such, Longdu forms a "dialect island" of Min Nan speakers (two other Min Nan enclaves exist in Zhongshan, Sanxiang and Nanlang-Zhangjiabian).
- ^ Nordhoff, Sebastian; Hammarström, Harald; Forkel, Robert; Haspelmath, Martin, eds. (2013). "Longdu dialect". Glottolog 2.2. Leipzig: Max Planck Institute for Evolutionary Anthropology.