Shiqi has the fewest tones of any Yue dialect, perhaps a Hakka influence.[6]
even
rising
going
entering
① ˥ 55
② ˥˩ 51
③ ˩˧ 13
⑤ ˨ 22
⑦a ˥ 5
⑧ ˨ 2
This appears to be due to mergers: the fact that the entering tone has split oddly suggests that it has split twice, as in Cantonese and Taishanese, but that tone ⑦b subsequently merged with ⑧.
References
^Chan, Marjorie KM (1982). "A response to Boltz'notes on Cantonese dentilabialization". Journal of the American Oriental Society: 107-109.
^Chong, Douglas DL (2010). "Hawai'i's Nam Long: their background and identity as a Zhongshan subgroup". Chinese America: History and Perspectives. Chinese Historical Society of America: 13.
^Egerod, Soren (1991). "A Short Study on the Namlong Dialects of Zhongshan Xian". Rocznik Orientalistyczny. Polska Akademia Nauk.