In Pianma Township, there are 587 Chashan people officially classified as ethnic Lisu. The local people consider the Chashan to be a distinct ethnic group, separate from the Jingpo people (景颇族). The Chashan autonym is ŋɔ³¹tʃʰaŋ⁵⁵ (Echang 峨昌), similar to that of the Achang. More Chashan speakers may be found across the border in Kachin State, Myanmar.
Dai, Qingxia 戴庆厦 (2010). Piànmǎ Cháshānrén jí qí yǔyán 片马茶山人及其语言 [The Chashan People of Pianma and Their Language] (in Chinese). Beijing: Shangwu yinshuguan. ISBN9787100069069.