In the literature on tonogenesis, it is commonly believed that as onset voicing-induced fundamental frequency (f0) differences are exaggerated, lexical tones would come into being, and the onset voicing distinction disappears. In some East and Southeast Asian tone languages, however, intermediate stages with tonal contrasts and voicing contrast co-existing have been reported. This study reports data from two Sinitic varieties (i.e., Shuangfeng Xiang and Lili Wu), which show the coexistence of the two types of laryngeal contrast, to shed light on what could be a possible diachronic pathway of changes in consonant voicing contrasts with lexical tones co-present in the system. Both varieties have obstruent voicing contrast and lexical tones; phonation serves to cue the voicing contrast. We found onsets from the voiced category consistently align with lower f0 contours across dialects and generations. However, the relationship between laryngeal timing (in terms of voice onset time) and phonatory state (in terms of contact quotient of vocal folds) varies, which suggests different patterns of cue reweighting for the phonetic implementation of voicing contrast, possibly reflecting different stages of how the voicing contrast may maintain or disappear.