Zhanglu dialect. Kam is spoken in an area
overlapping the shared borders of Guizhou, Guangxi, and
Hunan provinces of China. There are 9 tones in
non-checked syllables; 6 of these are level or falling
(55, 11, 323, 31, 53, 33). The other 3 have rising onsets
(35, 13, 453) and condition aspiration in stop-initial
syllables (including /?/). Six tones occur in checked
syllables, of which two (35, 13) condition aspiration.
Checked tones 55, 35, 21 are short and checked tones 323,
13, 31 are long. The raised low and mid central vowels
only occur with a coda (nasal or stop after mid central,
nasal or glide after low central). /j/ occurs after low
or back vowels, /w/ after low or front vowels.

Zheng Guoqiao and Yang Quan. 1988. The sounds of
Rongjiang Kam. In J.A. Edmondson and D.B. Solnit (eds.),
Comparative Kadai: Linguistic Studies Beyond Tai. Summer
Institute of Linguistics and University of Texas,
Arlington: 43-58.