Chashan (Chinese: 茶山; autonym: ŋɔ³¹tʃʰaŋ⁵⁵) is a Burmish language spoken in Pianma Township (片马镇), Lushui County, Yunnan, China, in Xiapianma (下片马),[2] Gangfang (岗房),[3] and Gulang (古浪)[4] villages.
[5] It is closely related to Lashi, and has 56.3% lexical similarity with Lashi of Lushui County out of a sample of 1,000 vocabulary words.
[6] In Pianma Township, there are 587 Chashan people officially classified as ethnic Lisu.
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.