Article snapshot taken from Wikipedia with creative commons attribution-sharealike license.
Give it a read and then ask your questions in the chat.
We can research this topic together.
Austroasiatic language spoken in Yunnan, China
For the U dialects of English, see U and non-U English.
Wang & Chen (1981) covers the dialect of Pengpan 碰拚, Dafengshan Township 大凤山乡, Shuangjiang County.
Zhou & Yan (1983) covers the dialect of Pangpin 胖品, Yongge Township 永革乡, Shuangjiang County.
Yan & Zhou (2012) cover U of Gantang 甘塘, Yongde County as well as U of Pangpin 胖品.
Svantesson (1991:67) documents the U dialect of Pã Xɛp (Bangxie, 邦协), Shahe Township 沙河乡, Shuangjiang County.
There two main dialects of U in Shuangjiang County: one spoken in Gongnong (公弄, now part of Mengku Town, 勐库镇) and one spoken in Bangbing (邦丙) and Dawen Mangga (大文乡忙嘎); the Dawen dialect is reportedly mutually intelligible with that of Shidian County (Shuangjiang County Ethnic Gazetteer 1995:160).
Avala (autonym: a21 va21 la21) is spoken in Bangliu (邦六), Manghuai Township (芒怀乡), Yun County (云县), Yunnan, China.
Phonology
U has four tones, high, low, rising, falling, which developed from vowel length and the nature of final consonants.
Simao Xingshu Minzu Shiwu Weiyuanhui Bian 思茂行署民族事务委员会编 (1991). Bùlǎngzú yánjiū 布朗族研究 [A Study of the Bulang People] (in Chinese). Kunming: Yunnan renmin chubanshe. ISBN7-222-00803-9.
Svantesson, Jan-Olof (1988). "U" (PDF). Linguistics of the Tibeto-Burman Area. 11 (1): 64–133. Archived (PDF) from the original on 2014-02-23. Retrieved 2012-06-02.
Tao, Chengmei 陶成美 (2016). Bùlǎngyǔ duōxiàng dìngyǔ jí qí yǔxù yánjiū 布朗语多项定语及其语序研究 (M.A. thesis) (in Chinese). Zhongyang Minzu Daxue.
Tao, Yuming 陶玉明 (2012). Zhōngguó Bùlǎngzú 中国布朗族 [The Bulang People of China] (in Chinese). Yinchuan: Ningxia renmin chubanshe.
Wang, Xingzhong 王兴中; Zhao, Weihua 赵卫华 (2013). Líncāng dìlǐ yǔ shuāngyǔ shǐyòng 临沧地理与双语使用 [Geography and Multilingualism in Lincang] (in Chinese). Kunming: Yunnan renmin chubanshe. ISBN978-7-222-08581-7.
Yan, Qixiang 颜其香; Zhou, Zhizhi 周植志 (2012). Zhōngguó Mèng-Gāomián yǔzú yǔyán yǔ Nányǎ yǔxì 中国孟高棉语族语言与南亚语系 [Mon-Khmer Languages of China and the Austroasiatic Family] (in Chinese). Beijing: Shehui kexue wenxian chubanshe.
Gazetteers and other Chinese government sources with lexical data
Nanjian County Gazetteer Commission (ed). 1993. Nanjian County Gazetteer . Chengdu: Sichuan Reference Press .
Na Ruzhen , et al. (eds). 1994. Zhenkang County Ethnic Gazetteer . Kunming: Yunnan People's Press .
Simao Prefecture Ethnic Minority Affairs Bureau (ed). 1990. A study of the Bulang people . m.s.
Xiao Dehua , et al. (eds). 1992. Zhenkang County Gazetteer . 1992. Chengdu: Sichuan People's Press .