Phonemically, Shuangfeng dialect has three tones. Phonetically, however, the pitch of a syllable depends on the voicing of the initial consonant so the tones are counted as five:
Wu, Yunji. (2005).A Synchronic and diachronic study of the grammar of the Chinese Xiang dialects. Berlin, New York: Mouton de Gruyter.ISBN3-11-018366-8
Yuán, jiāhuá (1989).Hànyǔ fāngyán gàiyào (An introduction to Chinese dialects). Beijing, China: Wénzì gǎigé chūbǎn shè. (袁家驊. 1989. 漢語方言概要. 北京:文字改革出版社.)