Bai
Layers:
Burmo-Qiangic independent branch
Old Southwestern Chinese (Old Chinese dialect spoken in the Sichuan Basin during the Zhou Dynasty)
more recent Chinese loanwords
Sources
Bo Wenze [薄文泽]. 2004. "A sketch of Caijia [蔡家话概况]". In Minzu Yuwen.
Wang Feng. 2006. Comparison of languages in contact: the distillation method and the case of Bai. Language and Linguistics Monograph Series B: Frontiers in Linguistics III. Taipei: Institute of Linguistics, Academia Sinica.